./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_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 df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:17:25,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:17:25,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:17:25,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:17:25,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:17:25,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:17:25,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:17:25,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:17:25,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:17:25,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:17:25,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:17:25,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:17:25,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:17:25,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:17:25,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:17:25,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:17:25,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:17:25,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:17:25,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:17:25,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:17:25,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:17:25,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:17:25,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:17:25,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:17:25,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:17:25,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:17:25,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:17:25,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:17:25,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:17:25,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:17:25,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:17:25,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:17:25,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:17:25,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:17:25,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:17:25,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:17:25,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:17:25,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:17:25,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:17:25,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:17:25,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:17:25,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:17:26,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:17:26,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:17:26,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:17:26,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:17:26,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:17:26,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:17:26,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:17:26,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:17:26,021 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:17:26,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:17:26,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:17:26,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:17:26,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:17:26,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:17:26,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:17:26,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:17:26,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:17:26,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:17:26,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:17:26,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:17:26,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:17:26,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:17:26,026 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:17:26,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:17:26,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:17:26,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:17:26,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 [2021-12-16 03:17:26,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:17:26,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:17:26,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:17:26,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:17:26,235 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:17:26,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-12-16 03:17:26,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a087d64/a17abf49112348a19b2491360d551b77/FLAG6e0183e73 [2021-12-16 03:17:26,837 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:17:26,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-12-16 03:17:26,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a087d64/a17abf49112348a19b2491360d551b77/FLAG6e0183e73 [2021-12-16 03:17:27,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a087d64/a17abf49112348a19b2491360d551b77 [2021-12-16 03:17:27,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:17:27,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:17:27,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:17:27,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:17:27,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:17:27,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:17:27" (1/1) ... [2021-12-16 03:17:27,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee782f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:27, skipping insertion in model container [2021-12-16 03:17:27,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:17:27" (1/1) ... [2021-12-16 03:17:27,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:17:27,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:17:27,591 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_left_trim_pred_harness.i[4504,4517] [2021-12-16 03:17:27,597 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_left_trim_pred_harness.i[4564,4577] [2021-12-16 03:17:28,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,076 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,301 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:17:28,302 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:17:28,303 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:17:28,303 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:17:28,304 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:17:28,304 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:17:28,305 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:17:28,305 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:17:28,306 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:17:28,306 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:17:28,383 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:17:28,440 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,447 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:17:28,571 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:17:28,589 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_left_trim_pred_harness.i[4504,4517] [2021-12-16 03:17:28,590 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_left_trim_pred_harness.i[4564,4577] [2021-12-16 03:17:28,623 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,624 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,624 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,630 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,639 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,640 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:17:28,675 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:17:28,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:17:28,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:17:28,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:17:28,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:17:28,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:17:28,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:17:28,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:17:28,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:17:28,696 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:17:28,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:17:28,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:17:28,927 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:17:28,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28 WrapperNode [2021-12-16 03:17:28,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:17:28,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:17:28,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:17:28,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:17:28,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,070 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 800 [2021-12-16 03:17:29,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:17:29,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:17:29,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:17:29,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:17:29,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:17:29,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:17:29,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:17:29,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:17:29,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (1/1) ... [2021-12-16 03:17:29,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:17:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:29,180 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) [2021-12-16 03:17:29,193 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 [2021-12-16 03:17:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-16 03:17:29,223 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-16 03:17:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:17:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:17:29,223 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:17:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:17:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:17:29,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:17:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-12-16 03:17:29,224 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-12-16 03:17:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:17:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:17:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:17:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:17:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:17:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:17:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:17:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-16 03:17:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-16 03:17:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:17:29,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:17:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:17:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:17:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:17:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-12-16 03:17:29,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-12-16 03:17:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:17:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:17:29,456 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:17:29,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:17:29,938 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:17:29,944 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:17:29,944 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 03:17:29,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:17:29 BoogieIcfgContainer [2021-12-16 03:17:29,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:17:29,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:17:29,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:17:29,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:17:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:17:27" (1/3) ... [2021-12-16 03:17:29,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad4abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:17:29, skipping insertion in model container [2021-12-16 03:17:29,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:17:28" (2/3) ... [2021-12-16 03:17:29,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad4abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:17:29, skipping insertion in model container [2021-12-16 03:17:29,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:17:29" (3/3) ... [2021-12-16 03:17:29,951 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_left_trim_pred_harness.i [2021-12-16 03:17:29,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:17:29,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:17:29,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:17:29,998 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 [2021-12-16 03:17:29,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:17:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 03:17:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 03:17:30,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:30,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:30,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2021-12-16 03:17:30,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:30,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644956806] [2021-12-16 03:17:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:30,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 03:17:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:17:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 03:17:30,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644956806] [2021-12-16 03:17:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644956806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:30,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:17:30,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76139613] [2021-12-16 03:17:30,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:17:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:17:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:17:30,515 INFO L87 Difference]: Start difference. First operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:30,549 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2021-12-16 03:17:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:17:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-12-16 03:17:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:30,558 INFO L225 Difference]: With dead ends: 186 [2021-12-16 03:17:30,558 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 03:17:30,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:17:30,567 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:30,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 03:17:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-16 03:17:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 03:17:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-16 03:17:30,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2021-12-16 03:17:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:30,606 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-16 03:17:30,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-16 03:17:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 03:17:30,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:30,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:30,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:17:30,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2021-12-16 03:17:30,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549228214] [2021-12-16 03:17:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:30,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 03:17:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 03:17:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 03:17:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:17:30,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:30,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549228214] [2021-12-16 03:17:30,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549228214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:30,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658498335] [2021-12-16 03:17:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:30,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:30,864 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) [2021-12-16 03:17:30,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:17:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:17:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 03:17:31,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658498335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:31,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-16 03:17:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250522444] [2021-12-16 03:17:31,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:17:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:17:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:17:31,499 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:31,608 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-12-16 03:17:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:17:31,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-12-16 03:17:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:31,612 INFO L225 Difference]: With dead ends: 155 [2021-12-16 03:17:31,612 INFO L226 Difference]: Without dead ends: 89 [2021-12-16 03:17:31,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:17:31,616 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:31,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-16 03:17:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-16 03:17:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-16 03:17:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-12-16 03:17:31,626 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2021-12-16 03:17:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:31,626 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-12-16 03:17:31,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-12-16 03:17:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 03:17:31,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:31,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-16 03:17:31,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:17:31,831 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 [2021-12-16 03:17:31,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2021-12-16 03:17:31,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041899849] [2021-12-16 03:17:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:31,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:31,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:31,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:31,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 03:17:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:17:32,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041899849] [2021-12-16 03:17:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041899849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719516463] [2021-12-16 03:17:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:32,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:32,095 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) [2021-12-16 03:17:32,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:17:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:17:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 03:17:32,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:32,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719516463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:32,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:32,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-16 03:17:32,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884923441] [2021-12-16 03:17:32,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:32,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:17:32,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:17:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:17:32,691 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:32,829 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2021-12-16 03:17:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:17:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-12-16 03:17:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:32,831 INFO L225 Difference]: With dead ends: 148 [2021-12-16 03:17:32,831 INFO L226 Difference]: Without dead ends: 89 [2021-12-16 03:17:32,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:17:32,837 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:32,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 348 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-16 03:17:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-16 03:17:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-16 03:17:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-12-16 03:17:32,856 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2021-12-16 03:17:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-12-16 03:17:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-12-16 03:17:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 03:17:32,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:32,857 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:32,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:33,063 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 [2021-12-16 03:17:33,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2021-12-16 03:17:33,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591649697] [2021-12-16 03:17:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:17:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:33,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591649697] [2021-12-16 03:17:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591649697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:33,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:33,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:17:33,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103104286] [2021-12-16 03:17:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:33,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:17:33,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:17:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:17:33,306 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-16 03:17:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:33,361 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2021-12-16 03:17:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:17:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-16 03:17:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:33,363 INFO L225 Difference]: With dead ends: 101 [2021-12-16 03:17:33,363 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 03:17:33,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:17:33,363 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:33,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 03:17:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-16 03:17:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-16 03:17:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2021-12-16 03:17:33,369 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2021-12-16 03:17:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2021-12-16 03:17:33,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-16 03:17:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2021-12-16 03:17:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 03:17:33,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:33,371 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-16 03:17:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:17:33,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2021-12-16 03:17:33,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:33,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837881172] [2021-12-16 03:17:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:33,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:17:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 03:17:33,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837881172] [2021-12-16 03:17:33,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837881172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162047548] [2021-12-16 03:17:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:33,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:33,783 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) [2021-12-16 03:17:33,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:17:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 03:17:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 03:17:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:35,187 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 26 treesize of output 14 [2021-12-16 03:17:35,224 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-16 03:17:35,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-16 03:17:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:17:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162047548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:17:35,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:17:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 23 [2021-12-16 03:17:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055421848] [2021-12-16 03:17:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 03:17:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 03:17:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-12-16 03:17:35,257 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-16 03:17:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:35,943 INFO L93 Difference]: Finished difference Result 234 states and 315 transitions. [2021-12-16 03:17:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 03:17:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2021-12-16 03:17:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:35,945 INFO L225 Difference]: With dead ends: 234 [2021-12-16 03:17:35,945 INFO L226 Difference]: Without dead ends: 153 [2021-12-16 03:17:35,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-12-16 03:17:35,946 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 149 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:35,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 747 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 526 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2021-12-16 03:17:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-16 03:17:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2021-12-16 03:17:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (40), 31 states have call predecessors, (40), 32 states have call successors, (40) [2021-12-16 03:17:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2021-12-16 03:17:35,956 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 73 [2021-12-16 03:17:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2021-12-16 03:17:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-16 03:17:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2021-12-16 03:17:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 03:17:35,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:35,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-16 03:17:35,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:36,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:36,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 754747503, now seen corresponding path program 1 times [2021-12-16 03:17:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646088265] [2021-12-16 03:17:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:36,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:17:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:17:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:17:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 03:17:36,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646088265] [2021-12-16 03:17:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646088265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:36,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:36,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:17:36,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832855694] [2021-12-16 03:17:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:36,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:17:36,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:17:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:17:36,349 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:36,360 INFO L93 Difference]: Finished difference Result 201 states and 263 transitions. [2021-12-16 03:17:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:17:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-12-16 03:17:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:36,362 INFO L225 Difference]: With dead ends: 201 [2021-12-16 03:17:36,362 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 03:17:36,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:17:36,363 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:36,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 03:17:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-16 03:17:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.148936170212766) internal successors, (108), 96 states have internal predecessors, (108), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (40), 31 states have call predecessors, (40), 32 states have call successors, (40) [2021-12-16 03:17:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 182 transitions. [2021-12-16 03:17:36,372 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 182 transitions. Word has length 80 [2021-12-16 03:17:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:36,372 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 182 transitions. [2021-12-16 03:17:36,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 182 transitions. [2021-12-16 03:17:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 03:17:36,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:36,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-12-16 03:17:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:17:36,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1442270590, now seen corresponding path program 1 times [2021-12-16 03:17:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109692033] [2021-12-16 03:17:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:36,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:17:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:17:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:17:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:17:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:17:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 03:17:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109692033] [2021-12-16 03:17:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109692033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:36,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:36,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:17:36,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248121850] [2021-12-16 03:17:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:36,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:17:36,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:17:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:17:36,545 INFO L87 Difference]: Start difference. First operand 141 states and 182 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 03:17:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:36,571 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2021-12-16 03:17:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:17:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-12-16 03:17:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:36,574 INFO L225 Difference]: With dead ends: 183 [2021-12-16 03:17:36,574 INFO L226 Difference]: Without dead ends: 141 [2021-12-16 03:17:36,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:17:36,575 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 18 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:36,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 367 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-16 03:17:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-16 03:17:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.148936170212766) internal successors, (108), 96 states have internal predecessors, (108), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (39), 31 states have call predecessors, (39), 32 states have call successors, (39) [2021-12-16 03:17:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2021-12-16 03:17:36,587 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 85 [2021-12-16 03:17:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:36,587 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2021-12-16 03:17:36,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 03:17:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2021-12-16 03:17:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 03:17:36,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:36,589 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:36,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:17:36,589 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2021-12-16 03:17:36,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:36,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588843707] [2021-12-16 03:17:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:36,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:17:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 03:17:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:17:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 03:17:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 03:17:36,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588843707] [2021-12-16 03:17:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588843707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243068134] [2021-12-16 03:17:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:36,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:36,817 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) [2021-12-16 03:17:36,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:17:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:17:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 03:17:37,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243068134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:37,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:37,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-16 03:17:37,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493678893] [2021-12-16 03:17:37,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:37,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:17:37,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:17:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:17:37,330 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:37,413 INFO L93 Difference]: Finished difference Result 238 states and 311 transitions. [2021-12-16 03:17:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:17:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-12-16 03:17:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:37,415 INFO L225 Difference]: With dead ends: 238 [2021-12-16 03:17:37,415 INFO L226 Difference]: Without dead ends: 146 [2021-12-16 03:17:37,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:17:37,416 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:37,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 799 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-16 03:17:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-16 03:17:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 101 states have internal predecessors, (112), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (44), 31 states have call predecessors, (44), 32 states have call successors, (44) [2021-12-16 03:17:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2021-12-16 03:17:37,429 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 81 [2021-12-16 03:17:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:37,430 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2021-12-16 03:17:37,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2021-12-16 03:17:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-16 03:17:37,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:37,431 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-16 03:17:37,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:37,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2021-12-16 03:17:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419874103] [2021-12-16 03:17:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:17:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 03:17:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:17:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:17:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 03:17:37,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419874103] [2021-12-16 03:17:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419874103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885661347] [2021-12-16 03:17:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:37,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:37,918 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) [2021-12-16 03:17:37,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:17:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2578 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 03:17:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:38,782 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 03:17:38,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-12-16 03:17:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 03:17:38,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:38,963 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 26 treesize of output 14 [2021-12-16 03:17:38,999 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-16 03:17:39,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-16 03:17:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 03:17:39,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885661347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:17:39,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:17:39,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 18 [2021-12-16 03:17:39,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186514209] [2021-12-16 03:17:39,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:39,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:17:39,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:17:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:17:39,033 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-16 03:17:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:39,655 INFO L93 Difference]: Finished difference Result 247 states and 323 transitions. [2021-12-16 03:17:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 03:17:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 82 [2021-12-16 03:17:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:39,659 INFO L225 Difference]: With dead ends: 247 [2021-12-16 03:17:39,659 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 03:17:39,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:17:39,661 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 69 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:39,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 925 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 585 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2021-12-16 03:17:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 03:17:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2021-12-16 03:17:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 106 states have internal predecessors, (113), 34 states have call successors, (34), 14 states have call predecessors, (34), 15 states have return successors, (47), 32 states have call predecessors, (47), 32 states have call successors, (47) [2021-12-16 03:17:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2021-12-16 03:17:39,681 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 82 [2021-12-16 03:17:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:39,682 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2021-12-16 03:17:39,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-16 03:17:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2021-12-16 03:17:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 03:17:39,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:39,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-16 03:17:39,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:39,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:39,903 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 814631676, now seen corresponding path program 1 times [2021-12-16 03:17:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957741589] [2021-12-16 03:17:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:39,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:17:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 03:17:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 03:17:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 03:17:40,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957741589] [2021-12-16 03:17:40,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957741589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:40,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:40,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:17:40,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589712434] [2021-12-16 03:17:40,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:40,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:17:40,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:17:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:17:40,095 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:17:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:40,134 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-12-16 03:17:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:17:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 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 89 [2021-12-16 03:17:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:40,135 INFO L225 Difference]: With dead ends: 163 [2021-12-16 03:17:40,135 INFO L226 Difference]: Without dead ends: 161 [2021-12-16 03:17:40,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:17:40,136 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:40,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 736 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-16 03:17:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-12-16 03:17:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 109 states have internal predecessors, (116), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (49), 34 states have call predecessors, (49), 34 states have call successors, (49) [2021-12-16 03:17:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2021-12-16 03:17:40,174 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 89 [2021-12-16 03:17:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:40,175 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2021-12-16 03:17:40,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:17:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2021-12-16 03:17:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 03:17:40,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:40,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-16 03:17:40,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:17:40,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2021-12-16 03:17:40,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:40,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333385436] [2021-12-16 03:17:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:40,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:17:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:17:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:17:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 03:17:40,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333385436] [2021-12-16 03:17:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333385436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993269780] [2021-12-16 03:17:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:40,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:40,356 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) [2021-12-16 03:17:40,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:17:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:17:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:17:40,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:40,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993269780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:40,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:40,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-16 03:17:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917905141] [2021-12-16 03:17:40,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:40,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:17:40,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:17:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:17:40,808 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:40,878 INFO L93 Difference]: Finished difference Result 245 states and 312 transitions. [2021-12-16 03:17:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:17:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-12-16 03:17:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:40,879 INFO L225 Difference]: With dead ends: 245 [2021-12-16 03:17:40,879 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 03:17:40,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:17:40,880 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:40,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 792 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 03:17:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-12-16 03:17:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 109 states have internal predecessors, (116), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (48), 34 states have call predecessors, (48), 34 states have call successors, (48) [2021-12-16 03:17:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2021-12-16 03:17:40,890 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 83 [2021-12-16 03:17:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:40,890 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2021-12-16 03:17:40,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:17:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2021-12-16 03:17:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 03:17:40,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:40,891 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-16 03:17:40,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 03:17:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:41,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash 711355972, now seen corresponding path program 1 times [2021-12-16 03:17:41,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459920974] [2021-12-16 03:17:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:41,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:17:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:17:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 03:17:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 03:17:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:41,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459920974] [2021-12-16 03:17:41,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459920974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4763993] [2021-12-16 03:17:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:41,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:41,450 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) [2021-12-16 03:17:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:17:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 03:17:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:43,024 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 03:17:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-12-16 03:17:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 03:17:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:44,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4763993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:44,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:17:44,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-12-16 03:17:44,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068947059] [2021-12-16 03:17:44,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:17:44,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:17:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=367, Unknown=2, NotChecked=0, Total=420 [2021-12-16 03:17:44,136 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 18 states have internal predecessors, (100), 7 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 03:17:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:45,687 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2021-12-16 03:17:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 03:17:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 18 states have internal predecessors, (100), 7 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 93 [2021-12-16 03:17:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:45,689 INFO L225 Difference]: With dead ends: 269 [2021-12-16 03:17:45,689 INFO L226 Difference]: Without dead ends: 181 [2021-12-16 03:17:45,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=164, Invalid=1094, Unknown=2, NotChecked=0, Total=1260 [2021-12-16 03:17:45,690 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 110 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:45,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1095 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 569 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2021-12-16 03:17:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-16 03:17:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-12-16 03:17:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 122 states have internal predecessors, (130), 40 states have call successors, (40), 18 states have call predecessors, (40), 17 states have return successors, (53), 36 states have call predecessors, (53), 38 states have call successors, (53) [2021-12-16 03:17:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2021-12-16 03:17:45,704 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 93 [2021-12-16 03:17:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:45,704 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2021-12-16 03:17:45,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 18 states have internal predecessors, (100), 7 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 03:17:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2021-12-16 03:17:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 03:17:45,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:45,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:45,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:45,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:45,906 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2021-12-16 03:17:45,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449022304] [2021-12-16 03:17:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:45,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:17:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:17:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:46,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449022304] [2021-12-16 03:17:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449022304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437333025] [2021-12-16 03:17:46,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:17:46,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:46,151 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) [2021-12-16 03:17:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:17:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 03:17:46,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:17:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 03:17:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:46,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437333025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:46,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-16 03:17:46,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919368384] [2021-12-16 03:17:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:17:46,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:17:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:17:46,879 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:46,984 INFO L93 Difference]: Finished difference Result 260 states and 327 transitions. [2021-12-16 03:17:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:17:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-16 03:17:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:46,985 INFO L225 Difference]: With dead ends: 260 [2021-12-16 03:17:46,985 INFO L226 Difference]: Without dead ends: 187 [2021-12-16 03:17:46,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:17:46,986 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 24 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:46,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 610 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 124 Unchecked, 0.0s Time] [2021-12-16 03:17:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-16 03:17:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2021-12-16 03:17:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 122 states have (on average 1.098360655737705) internal successors, (134), 126 states have internal predecessors, (134), 41 states have call successors, (41), 18 states have call predecessors, (41), 17 states have return successors, (54), 36 states have call predecessors, (54), 39 states have call successors, (54) [2021-12-16 03:17:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 229 transitions. [2021-12-16 03:17:46,993 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 229 transitions. Word has length 85 [2021-12-16 03:17:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:46,993 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 229 transitions. [2021-12-16 03:17:46,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:17:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 229 transitions. [2021-12-16 03:17:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 03:17:46,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:46,994 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:47,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:47,211 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,SelfDestructingSolverStorable12 [2021-12-16 03:17:47,211 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1718798494, now seen corresponding path program 1 times [2021-12-16 03:17:47,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797341007] [2021-12-16 03:17:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 03:17:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:17:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:17:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:17:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:17:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-16 03:17:47,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797341007] [2021-12-16 03:17:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797341007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:47,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53640346] [2021-12-16 03:17:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:47,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:47,629 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) [2021-12-16 03:17:47,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:17:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:47,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 03:17:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:47,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:17:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:17:48,118 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 15 treesize of output 7 [2021-12-16 03:17:48,127 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 15 treesize of output 7 [2021-12-16 03:17:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 03:17:48,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:48,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53640346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:48,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:48,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-12-16 03:17:48,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38192749] [2021-12-16 03:17:48,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:48,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:17:48,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:17:48,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:17:48,205 INFO L87 Difference]: Start difference. First operand 181 states and 229 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 03:17:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:48,298 INFO L93 Difference]: Finished difference Result 347 states and 446 transitions. [2021-12-16 03:17:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:17:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 98 [2021-12-16 03:17:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:48,300 INFO L225 Difference]: With dead ends: 347 [2021-12-16 03:17:48,300 INFO L226 Difference]: Without dead ends: 228 [2021-12-16 03:17:48,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:17:48,301 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 58 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 518 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-16 03:17:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-16 03:17:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 213. [2021-12-16 03:17:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 152 states have internal predecessors, (162), 44 states have call successors, (44), 21 states have call predecessors, (44), 21 states have return successors, (58), 39 states have call predecessors, (58), 42 states have call successors, (58) [2021-12-16 03:17:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 264 transitions. [2021-12-16 03:17:48,309 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 264 transitions. Word has length 98 [2021-12-16 03:17:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:48,309 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 264 transitions. [2021-12-16 03:17:48,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 03:17:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 264 transitions. [2021-12-16 03:17:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 03:17:48,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:48,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:48,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:48,527 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,SelfDestructingSolverStorable13 [2021-12-16 03:17:48,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2021-12-16 03:17:48,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990069849] [2021-12-16 03:17:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:48,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:17:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:17:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:17:48,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990069849] [2021-12-16 03:17:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990069849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884712790] [2021-12-16 03:17:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:48,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:48,885 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) [2021-12-16 03:17:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:17:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 03:17:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:51,790 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 25 treesize of output 17 [2021-12-16 03:17:51,793 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 21 treesize of output 13 [2021-12-16 03:17:51,796 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 18 treesize of output 10 [2021-12-16 03:17:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:17:51,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:51,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884712790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:51,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:51,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 22 [2021-12-16 03:17:51,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446424306] [2021-12-16 03:17:51,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:51,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 03:17:51,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 03:17:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:17:51,898 INFO L87 Difference]: Start difference. First operand 213 states and 264 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:17:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:52,935 INFO L93 Difference]: Finished difference Result 379 states and 498 transitions. [2021-12-16 03:17:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 03:17:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-12-16 03:17:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:52,937 INFO L225 Difference]: With dead ends: 379 [2021-12-16 03:17:52,937 INFO L226 Difference]: Without dead ends: 260 [2021-12-16 03:17:52,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-12-16 03:17:52,938 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 202 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:52,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 526 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 817 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2021-12-16 03:17:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-16 03:17:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 229. [2021-12-16 03:17:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 160 states have (on average 1.1) internal successors, (176), 165 states have internal predecessors, (176), 45 states have call successors, (45), 22 states have call predecessors, (45), 23 states have return successors, (67), 41 states have call predecessors, (67), 43 states have call successors, (67) [2021-12-16 03:17:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2021-12-16 03:17:52,950 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 91 [2021-12-16 03:17:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:52,950 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2021-12-16 03:17:52,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:17:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2021-12-16 03:17:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 03:17:52,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:52,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:52,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:53,152 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,SelfDestructingSolverStorable14 [2021-12-16 03:17:53,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash -62995835, now seen corresponding path program 1 times [2021-12-16 03:17:53,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489972] [2021-12-16 03:17:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:53,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:17:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 03:17:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:17:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:17:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:17:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:17:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 03:17:53,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489972] [2021-12-16 03:17:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513909297] [2021-12-16 03:17:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:53,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:53,271 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) [2021-12-16 03:17:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:17:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:17:53,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:17:53,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:17:53,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513909297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:53,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:17:53,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-16 03:17:53,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112925459] [2021-12-16 03:17:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:53,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:17:53,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:17:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:17:53,722 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:17:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:53,749 INFO L93 Difference]: Finished difference Result 345 states and 448 transitions. [2021-12-16 03:17:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:17:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 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 91 [2021-12-16 03:17:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:53,750 INFO L225 Difference]: With dead ends: 345 [2021-12-16 03:17:53,750 INFO L226 Difference]: Without dead ends: 191 [2021-12-16 03:17:53,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:17:53,752 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:53,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 315 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:17:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-16 03:17:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-12-16 03:17:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 127 states have (on average 1.078740157480315) internal successors, (137), 132 states have internal predecessors, (137), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (53), 37 states have call predecessors, (53), 39 states have call successors, (53) [2021-12-16 03:17:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2021-12-16 03:17:53,760 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 91 [2021-12-16 03:17:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:53,760 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2021-12-16 03:17:53,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:17:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2021-12-16 03:17:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 03:17:53,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:53,762 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-12-16 03:17:53,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:53,967 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,SelfDestructingSolverStorable15 [2021-12-16 03:17:53,967 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2021-12-16 03:17:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648035451] [2021-12-16 03:17:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:17:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-16 03:17:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 03:17:54,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:54,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648035451] [2021-12-16 03:17:54,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648035451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:54,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:54,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:17:54,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818376755] [2021-12-16 03:17:54,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:54,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:17:54,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:17:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:17:54,175 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 03:17:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:54,423 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2021-12-16 03:17:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:17:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-12-16 03:17:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:54,436 INFO L225 Difference]: With dead ends: 196 [2021-12-16 03:17:54,436 INFO L226 Difference]: Without dead ends: 194 [2021-12-16 03:17:54,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:17:54,437 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:54,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 524 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:17:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-16 03:17:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-12-16 03:17:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.0769230769230769) internal successors, (140), 135 states have internal predecessors, (140), 42 states have call successors, (42), 19 states have call predecessors, (42), 20 states have return successors, (54), 38 states have call predecessors, (54), 40 states have call successors, (54) [2021-12-16 03:17:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 236 transitions. [2021-12-16 03:17:54,445 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 236 transitions. Word has length 100 [2021-12-16 03:17:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:54,445 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 236 transitions. [2021-12-16 03:17:54,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 03:17:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 236 transitions. [2021-12-16 03:17:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 03:17:54,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:54,447 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-12-16 03:17:54,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:17:54,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2111461513, now seen corresponding path program 1 times [2021-12-16 03:17:54,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298094813] [2021-12-16 03:17:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:54,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:17:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-16 03:17:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 03:17:54,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298094813] [2021-12-16 03:17:54,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298094813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176356936] [2021-12-16 03:17:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:54,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:17:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:17:54,909 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) [2021-12-16 03:17:54,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:17:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 03:17:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:17:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 03:17:55,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:17:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176356936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:17:55,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:17:55,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-12-16 03:17:55,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000266550] [2021-12-16 03:17:55,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:17:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 03:17:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 03:17:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-12-16 03:17:55,954 INFO L87 Difference]: Start difference. First operand 193 states and 236 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-16 03:17:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:57,450 INFO L93 Difference]: Finished difference Result 312 states and 400 transitions. [2021-12-16 03:17:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:17:57,450 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 104 [2021-12-16 03:17:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:57,451 INFO L225 Difference]: With dead ends: 312 [2021-12-16 03:17:57,451 INFO L226 Difference]: Without dead ends: 242 [2021-12-16 03:17:57,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 03:17:57,453 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 232 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:57,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 449 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1272 Invalid, 0 Unknown, 501 Unchecked, 0.8s Time] [2021-12-16 03:17:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-16 03:17:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2021-12-16 03:17:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 139 states have (on average 1.079136690647482) internal successors, (150), 144 states have internal predecessors, (150), 49 states have call successors, (49), 20 states have call predecessors, (49), 21 states have return successors, (66), 45 states have call predecessors, (66), 47 states have call successors, (66) [2021-12-16 03:17:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 265 transitions. [2021-12-16 03:17:57,462 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 265 transitions. Word has length 104 [2021-12-16 03:17:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:57,462 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 265 transitions. [2021-12-16 03:17:57,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 9 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-16 03:17:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 265 transitions. [2021-12-16 03:17:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 03:17:57,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:57,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:57,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 03:17:57,675 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 [2021-12-16 03:17:57,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2021-12-16 03:17:57,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:57,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886169971] [2021-12-16 03:17:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:57,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 03:17:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:17:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:17:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:17:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:17:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:17:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 03:17:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 03:17:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:17:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-16 03:17:58,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:58,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886169971] [2021-12-16 03:17:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886169971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:58,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:58,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:17:58,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277456329] [2021-12-16 03:17:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:17:58,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:17:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:17:58,350 INFO L87 Difference]: Start difference. First operand 210 states and 265 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 03:17:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:59,210 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2021-12-16 03:17:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 03:17:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 109 [2021-12-16 03:17:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:59,214 INFO L225 Difference]: With dead ends: 312 [2021-12-16 03:17:59,214 INFO L226 Difference]: Without dead ends: 242 [2021-12-16 03:17:59,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:17:59,215 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 146 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:59,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 584 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 03:17:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-16 03:17:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 224. [2021-12-16 03:17:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 153 states have internal predecessors, (158), 53 states have call successors, (53), 20 states have call predecessors, (53), 23 states have return successors, (78), 50 states have call predecessors, (78), 51 states have call successors, (78) [2021-12-16 03:17:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 289 transitions. [2021-12-16 03:17:59,229 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 289 transitions. Word has length 109 [2021-12-16 03:17:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:59,230 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 289 transitions. [2021-12-16 03:17:59,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 03:17:59,231 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 289 transitions. [2021-12-16 03:17:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 03:17:59,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:59,232 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:59,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:17:59,232 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2021-12-16 03:17:59,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439548476] [2021-12-16 03:17:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:59,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 03:17:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:17:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:17:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:17:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:17:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:17:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 03:17:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 03:17:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:17:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-16 03:17:59,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:59,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439548476] [2021-12-16 03:17:59,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439548476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:59,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:59,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:17:59,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075838305] [2021-12-16 03:17:59,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:59,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:17:59,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:17:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:17:59,421 INFO L87 Difference]: Start difference. First operand 224 states and 289 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 03:17:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:59,562 INFO L93 Difference]: Finished difference Result 303 states and 397 transitions. [2021-12-16 03:17:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:17:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-16 03:17:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:59,563 INFO L225 Difference]: With dead ends: 303 [2021-12-16 03:17:59,563 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 03:17:59,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:17:59,564 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:59,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 03:17:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-12-16 03:17:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 141 states have (on average 1.070921985815603) internal successors, (151), 146 states have internal predecessors, (151), 53 states have call successors, (53), 20 states have call predecessors, (53), 22 states have return successors, (70), 50 states have call predecessors, (70), 51 states have call successors, (70) [2021-12-16 03:17:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 274 transitions. [2021-12-16 03:17:59,574 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 274 transitions. Word has length 109 [2021-12-16 03:17:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:59,575 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 274 transitions. [2021-12-16 03:17:59,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 03:17:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 274 transitions. [2021-12-16 03:17:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 03:17:59,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:59,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:59,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:17:59,576 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2021-12-16 03:17:59,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225266671] [2021-12-16 03:17:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:59,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:17:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:17:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:17:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:17:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:17:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:17:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:17:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:17:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:17:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-16 03:17:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:17:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 03:17:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:17:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-16 03:17:59,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:17:59,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225266671] [2021-12-16 03:17:59,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225266671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:17:59,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:17:59,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:17:59,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206904112] [2021-12-16 03:17:59,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:17:59,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:17:59,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:17:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:17:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:17:59,736 INFO L87 Difference]: Start difference. First operand 217 states and 274 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-16 03:17:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:17:59,913 INFO L93 Difference]: Finished difference Result 230 states and 287 transitions. [2021-12-16 03:17:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:17:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 112 [2021-12-16 03:17:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:17:59,915 INFO L225 Difference]: With dead ends: 230 [2021-12-16 03:17:59,915 INFO L226 Difference]: Without dead ends: 214 [2021-12-16 03:17:59,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:17:59,915 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 50 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:17:59,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 292 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:17:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-16 03:17:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-12-16 03:17:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 142 states have internal predecessors, (146), 53 states have call successors, (53), 19 states have call predecessors, (53), 21 states have return successors, (69), 50 states have call predecessors, (69), 51 states have call successors, (69) [2021-12-16 03:17:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 268 transitions. [2021-12-16 03:17:59,927 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 268 transitions. Word has length 112 [2021-12-16 03:17:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:17:59,928 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 268 transitions. [2021-12-16 03:17:59,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-16 03:17:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 268 transitions. [2021-12-16 03:17:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 03:17:59,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:17:59,930 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:17:59,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 03:17:59,930 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:17:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:17:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash -641051383, now seen corresponding path program 1 times [2021-12-16 03:17:59,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:17:59,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797924203] [2021-12-16 03:17:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:17:59,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:17:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:18:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:18:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 03:18:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:18:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:18:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:18:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:18:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:18:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:18:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 03:18:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 03:18:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:18:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 03:18:00,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:18:00,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797924203] [2021-12-16 03:18:00,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797924203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:18:00,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:18:00,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:18:00,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284138147] [2021-12-16 03:18:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:18:00,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:18:00,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:18:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:18:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:18:00,187 INFO L87 Difference]: Start difference. First operand 212 states and 268 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 03:18:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:18:00,594 INFO L93 Difference]: Finished difference Result 220 states and 276 transitions. [2021-12-16 03:18:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 03:18:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 111 [2021-12-16 03:18:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:18:00,601 INFO L225 Difference]: With dead ends: 220 [2021-12-16 03:18:00,601 INFO L226 Difference]: Without dead ends: 218 [2021-12-16 03:18:00,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-12-16 03:18:00,602 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 70 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:18:00,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 837 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:18:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-16 03:18:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-12-16 03:18:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 140 states have (on average 1.0642857142857143) internal successors, (149), 145 states have internal predecessors, (149), 54 states have call successors, (54), 20 states have call predecessors, (54), 22 states have return successors, (70), 51 states have call predecessors, (70), 52 states have call successors, (70) [2021-12-16 03:18:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 273 transitions. [2021-12-16 03:18:00,614 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 273 transitions. Word has length 111 [2021-12-16 03:18:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:18:00,615 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 273 transitions. [2021-12-16 03:18:00,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 03:18:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 273 transitions. [2021-12-16 03:18:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-16 03:18:00,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:18:00,617 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:18:00,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 03:18:00,617 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:18:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:18:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2021-12-16 03:18:00,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:18:00,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122997915] [2021-12-16 03:18:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:18:00,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:18:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:18:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:18:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:18:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:18:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:18:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:18:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:18:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:18:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:18:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:18:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:18:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:18:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-16 03:18:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:18:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 03:18:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 03:18:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:18:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122997915] [2021-12-16 03:18:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122997915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:18:00,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:18:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:18:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887618393] [2021-12-16 03:18:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:18:00,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:18:00,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:18:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:18:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:18:00,793 INFO L87 Difference]: Start difference. First operand 217 states and 273 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-16 03:18:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:18:01,051 INFO L93 Difference]: Finished difference Result 225 states and 281 transitions. [2021-12-16 03:18:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:18:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-12-16 03:18:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:18:01,057 INFO L225 Difference]: With dead ends: 225 [2021-12-16 03:18:01,057 INFO L226 Difference]: Without dead ends: 223 [2021-12-16 03:18:01,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:18:01,057 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 49 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:18:01,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 515 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:18:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-16 03:18:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2021-12-16 03:18:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 143 states have (on average 1.062937062937063) internal successors, (152), 148 states have internal predecessors, (152), 55 states have call successors, (55), 21 states have call predecessors, (55), 23 states have return successors, (71), 52 states have call predecessors, (71), 53 states have call successors, (71) [2021-12-16 03:18:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 278 transitions. [2021-12-16 03:18:01,068 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 278 transitions. Word has length 114 [2021-12-16 03:18:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:18:01,069 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 278 transitions. [2021-12-16 03:18:01,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-16 03:18:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 278 transitions. [2021-12-16 03:18:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 03:18:01,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:18:01,070 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:18:01,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 03:18:01,070 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:18:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:18:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2021-12-16 03:18:01,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:18:01,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753904617] [2021-12-16 03:18:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:18:01,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:18:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:18:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:18:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 03:18:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:18:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:18:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:18:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:18:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:18:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:18:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 03:18:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 03:18:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:18:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-16 03:18:01,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:18:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753904617] [2021-12-16 03:18:01,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753904617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:18:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638239764] [2021-12-16 03:18:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:18:01,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:18:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:18:01,836 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) [2021-12-16 03:18:01,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 03:18:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:18:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-16 03:18:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:18:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:18:02,350 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:18:02,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-16 03:18:02,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:18:02,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 03:18:02,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 03:18:02,770 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 23 treesize of output 23 [2021-12-16 03:18:15,837 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 23 treesize of output 23