./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_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_buf_eq_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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:14:51,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:14:51,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:14:52,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:14:52,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:14:52,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:14:52,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:14:52,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:14:52,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:14:52,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:14:52,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:14:52,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:14:52,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:14:52,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:14:52,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:14:52,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:14:52,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:14:52,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:14:52,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:14:52,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:14:52,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:14:52,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:14:52,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:14:52,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:14:52,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:14:52,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:14:52,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:14:52,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:14:52,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:14:52,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:14:52,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:14:52,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:14:52,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:14:52,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:14:52,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:14:52,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:14:52,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:14:52,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:14:52,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:14:52,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:14:52,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:14:52,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:14:52,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:14:52,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:14:52,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:14:52,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:14:52,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:14:52,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:14:52,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:14:52,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:14:52,086 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:14:52,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:14:52,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:14:52,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:14:52,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:14:52,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:14:52,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:14:52,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:14:52,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:14:52,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:14:52,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:14:52,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:14:52,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:14:52,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-12-16 03:14:52,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:14:52,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:14:52,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:14:52,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:14:52,310 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:14:52,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-12-16 03:14:52,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12decbd14/718e136597f44f54aee1bd3b1de6bf7a/FLAG738e42581 [2021-12-16 03:14:52,932 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:14:52,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-12-16 03:14:52,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12decbd14/718e136597f44f54aee1bd3b1de6bf7a/FLAG738e42581 [2021-12-16 03:14:53,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12decbd14/718e136597f44f54aee1bd3b1de6bf7a [2021-12-16 03:14:53,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:14:53,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:14:53,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:14:53,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:14:53,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:14:53,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:14:53" (1/1) ... [2021-12-16 03:14:53,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f539bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:53, skipping insertion in model container [2021-12-16 03:14:53,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:14:53" (1/1) ... [2021-12-16 03:14:53,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:14:53,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:14:53,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-12-16 03:14:53,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-12-16 03:14:54,115 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,118 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,120 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,132 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,133 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,135 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,136 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,375 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:14:54,377 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:14:54,377 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:14:54,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:14:54,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:14:54,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:14:54,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:14:54,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:14:54,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:14:54,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:14:54,503 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:14:54,579 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,580 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:14:54,695 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:14:54,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-12-16 03:14:54,718 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-12-16 03:14:54,739 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,740 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,773 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:14:54,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:14:54,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:14:54,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:14:54,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:14:54,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:14:54,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:14:54,776 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:14:54,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:14:54,777 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:14:54,793 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:14:54,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:14:54,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:14:55,069 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:14:55,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55 WrapperNode [2021-12-16 03:14:55,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:14:55,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:14:55,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:14:55,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:14:55,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,261 INFO L137 Inliner]: procedures = 691, calls = 2666, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 887 [2021-12-16 03:14:55,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:14:55,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:14:55,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:14:55,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:14:55,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:14:55,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:14:55,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:14:55,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:14:55,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (1/1) ... [2021-12-16 03:14:55,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:14:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:14:55,368 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 03:14:55,391 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 03:14:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-16 03:14:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-16 03:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 03:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:14:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:14:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:14:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:14:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:14:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-16 03:14:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-16 03:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-16 03:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-16 03:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:14:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-16 03:14:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-16 03:14:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:14:55,403 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:14:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:14:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:14:55,403 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-16 03:14:55,404 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-16 03:14:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:14:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-16 03:14:55,404 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-16 03:14:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-16 03:14:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-16 03:14:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-12-16 03:14:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-12-16 03:14:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:14:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-12-16 03:14:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-12-16 03:14:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:14:55,662 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:14:55,670 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:14:56,252 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:14:56,257 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:14:56,258 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 03:14:56,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:14:56 BoogieIcfgContainer [2021-12-16 03:14:56,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:14:56,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:14:56,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:14:56,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:14:56,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:14:53" (1/3) ... [2021-12-16 03:14:56,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b5eee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:14:56, skipping insertion in model container [2021-12-16 03:14:56,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:14:55" (2/3) ... [2021-12-16 03:14:56,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b5eee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:14:56, skipping insertion in model container [2021-12-16 03:14:56,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:14:56" (3/3) ... [2021-12-16 03:14:56,265 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2021-12-16 03:14:56,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:14:56,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:14:56,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:14:56,304 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 03:14:56,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:14:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-16 03:14:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 03:14:56,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:14:56,340 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:14:56,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:14:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:14:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1419889978, now seen corresponding path program 1 times [2021-12-16 03:14:56,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:14:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67350280] [2021-12-16 03:14:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:14:56,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:14:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:14:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:14:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:14:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:14:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:14:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:14:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:14:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:14:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:14:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:14:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:14:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:14:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:14:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 03:14:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 03:14:57,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:14:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67350280] [2021-12-16 03:14:57,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67350280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:14:57,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:14:57,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:14:57,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320817333] [2021-12-16 03:14:57,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:14:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:14:57,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:14:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:14:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:14:57,150 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:14:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:14:57,514 INFO L93 Difference]: Finished difference Result 304 states and 439 transitions. [2021-12-16 03:14:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:14:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-12-16 03:14:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:14:57,523 INFO L225 Difference]: With dead ends: 304 [2021-12-16 03:14:57,523 INFO L226 Difference]: Without dead ends: 150 [2021-12-16 03:14:57,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:14:57,528 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 213 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:14:57,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 237 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:14:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-16 03:14:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-16 03:14:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 89 states have internal predecessors, (107), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-16 03:14:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-12-16 03:14:57,588 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 113 [2021-12-16 03:14:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:14:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-12-16 03:14:57,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:14:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-12-16 03:14:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 03:14:57,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:14:57,595 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:14:57,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:14:57,596 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:14:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:14:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -254215752, now seen corresponding path program 1 times [2021-12-16 03:14:57,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:14:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933524186] [2021-12-16 03:14:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:14:57,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:14:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:14:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:14:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:14:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:14:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:14:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:14:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:14:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:14:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:14:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:14:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:14:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:14:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:14:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 03:14:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-16 03:14:57,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:14:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933524186] [2021-12-16 03:14:57,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933524186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:14:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494948157] [2021-12-16 03:14:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:14:57,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:14:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:14:57,897 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 03:14:57,898 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 03:14:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:14:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:14:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 03:14:58,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:14:58,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494948157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:14:58,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:14:58,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-16 03:14:58,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896018193] [2021-12-16 03:14:58,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:14:58,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:14:58,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:14:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:14:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:14:58,627 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:14:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:14:58,836 INFO L93 Difference]: Finished difference Result 292 states and 395 transitions. [2021-12-16 03:14:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:14:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-12-16 03:14:58,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:14:58,838 INFO L225 Difference]: With dead ends: 292 [2021-12-16 03:14:58,838 INFO L226 Difference]: Without dead ends: 151 [2021-12-16 03:14:58,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:14:58,840 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 214 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:14:58,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 433 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:14:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-16 03:14:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-16 03:14:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-16 03:14:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 206 transitions. [2021-12-16 03:14:58,852 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 206 transitions. Word has length 113 [2021-12-16 03:14:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:14:58,852 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 206 transitions. [2021-12-16 03:14:58,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:14:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 206 transitions. [2021-12-16 03:14:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 03:14:58,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:14:58,854 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:14:58,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:14:59,070 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 03:14:59,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:14:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:14:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1731779843, now seen corresponding path program 1 times [2021-12-16 03:14:59,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:14:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036598501] [2021-12-16 03:14:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:14:59,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:14:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:14:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:14:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:14:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:14:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:14:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:14:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:14:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:14:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:14:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:14:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:14:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:14:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:14:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:14:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:14:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:14:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:14:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-16 03:14:59,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:14:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036598501] [2021-12-16 03:14:59,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036598501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:14:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713832491] [2021-12-16 03:14:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:14:59,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:14:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:14:59,614 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 03:14:59,637 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 03:15:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:15:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 03:15:00,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713832491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:00,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:00,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2021-12-16 03:15:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781668156] [2021-12-16 03:15:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:15:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:15:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:15:00,448 INFO L87 Difference]: Start difference. First operand 151 states and 206 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-16 03:15:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:00,688 INFO L93 Difference]: Finished difference Result 247 states and 339 transitions. [2021-12-16 03:15:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:15:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2021-12-16 03:15:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:00,693 INFO L225 Difference]: With dead ends: 247 [2021-12-16 03:15:00,693 INFO L226 Difference]: Without dead ends: 151 [2021-12-16 03:15:00,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:15:00,694 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 229 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:00,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 698 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:15:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-16 03:15:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-16 03:15:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-12-16 03:15:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2021-12-16 03:15:00,704 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 119 [2021-12-16 03:15:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:00,704 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2021-12-16 03:15:00,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-16 03:15:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2021-12-16 03:15:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 03:15:00,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:00,706 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:00,729 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 03:15:00,926 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 03:15:00,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1773749607, now seen corresponding path program 2 times [2021-12-16 03:15:00,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:00,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754722746] [2021-12-16 03:15:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:00,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:15:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:15:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:15:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 03:15:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-16 03:15:01,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754722746] [2021-12-16 03:15:01,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754722746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153210304] [2021-12-16 03:15:01,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:15:01,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:01,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:01,308 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 03:15:01,349 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 03:15:01,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 03:15:01,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:15:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:15:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-16 03:15:01,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:01,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153210304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:01,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:01,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-16 03:15:01,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339858944] [2021-12-16 03:15:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:01,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:15:01,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:15:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:15:01,886 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-16 03:15:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:01,945 INFO L93 Difference]: Finished difference Result 163 states and 223 transitions. [2021-12-16 03:15:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:15:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2021-12-16 03:15:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:01,948 INFO L225 Difference]: With dead ends: 163 [2021-12-16 03:15:01,948 INFO L226 Difference]: Without dead ends: 161 [2021-12-16 03:15:01,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:15:01,949 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 22 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:01,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1358 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:15:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-16 03:15:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-12-16 03:15:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 99 states have internal predecessors, (115), 47 states have call successors, (47), 14 states have call predecessors, (47), 16 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-12-16 03:15:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 220 transitions. [2021-12-16 03:15:01,960 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 220 transitions. Word has length 131 [2021-12-16 03:15:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 220 transitions. [2021-12-16 03:15:01,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-16 03:15:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 220 transitions. [2021-12-16 03:15:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-16 03:15:01,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:01,962 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:01,982 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 03:15:02,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:02,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1277784929, now seen corresponding path program 1 times [2021-12-16 03:15:02,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:02,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788293201] [2021-12-16 03:15:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:02,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:15:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:15:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:15:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 03:15:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-16 03:15:02,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:02,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788293201] [2021-12-16 03:15:02,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788293201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:02,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161136582] [2021-12-16 03:15:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:02,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:02,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:15:02,507 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 03:15:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:15:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 03:15:03,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161136582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:03,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-16 03:15:03,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529793338] [2021-12-16 03:15:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:03,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:15:03,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:15:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:15:03,196 INFO L87 Difference]: Start difference. First operand 160 states and 220 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-16 03:15:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:03,417 INFO L93 Difference]: Finished difference Result 280 states and 386 transitions. [2021-12-16 03:15:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:15:03,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2021-12-16 03:15:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:03,420 INFO L225 Difference]: With dead ends: 280 [2021-12-16 03:15:03,420 INFO L226 Difference]: Without dead ends: 157 [2021-12-16 03:15:03,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:15:03,422 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 228 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:03,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 701 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:15:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-16 03:15:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-16 03:15:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 96 states have internal predecessors, (112), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-16 03:15:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2021-12-16 03:15:03,431 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 135 [2021-12-16 03:15:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:03,431 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2021-12-16 03:15:03,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-16 03:15:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2021-12-16 03:15:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 03:15:03,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:03,433 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:03,479 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 03:15:03,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:03,651 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1196248684, now seen corresponding path program 1 times [2021-12-16 03:15:03,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:03,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866617427] [2021-12-16 03:15:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:03,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:15:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:15:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:15:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-16 03:15:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-16 03:15:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866617427] [2021-12-16 03:15:04,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866617427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:04,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:04,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:15:04,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718136184] [2021-12-16 03:15:04,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:04,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:15:04,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:15:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:04,028 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-16 03:15:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:04,544 INFO L93 Difference]: Finished difference Result 334 states and 471 transitions. [2021-12-16 03:15:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2021-12-16 03:15:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:04,548 INFO L225 Difference]: With dead ends: 334 [2021-12-16 03:15:04,548 INFO L226 Difference]: Without dead ends: 184 [2021-12-16 03:15:04,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:15:04,549 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:04,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 426 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:15:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-16 03:15:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-12-16 03:15:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 99 states have (on average 1.202020202020202) internal successors, (119), 101 states have internal predecessors, (119), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-16 03:15:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 220 transitions. [2021-12-16 03:15:04,563 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 220 transitions. Word has length 141 [2021-12-16 03:15:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:04,564 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 220 transitions. [2021-12-16 03:15:04,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-16 03:15:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 220 transitions. [2021-12-16 03:15:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 03:15:04,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:04,566 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:04,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:15:04,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1454414122, now seen corresponding path program 1 times [2021-12-16 03:15:04,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:04,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334816002] [2021-12-16 03:15:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:04,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:15:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:04,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:15:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:15:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-16 03:15:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-16 03:15:05,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334816002] [2021-12-16 03:15:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334816002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006558417] [2021-12-16 03:15:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:05,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:05,352 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 03:15:05,422 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 03:15:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 03:15:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:06,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 03:15:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 03:15:06,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006558417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:06,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:06,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2021-12-16 03:15:06,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712221390] [2021-12-16 03:15:06,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 03:15:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 03:15:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-12-16 03:15:06,552 INFO L87 Difference]: Start difference. First operand 162 states and 220 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-16 03:15:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:06,646 INFO L93 Difference]: Finished difference Result 340 states and 457 transitions. [2021-12-16 03:15:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:15:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 141 [2021-12-16 03:15:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:06,648 INFO L225 Difference]: With dead ends: 340 [2021-12-16 03:15:06,648 INFO L226 Difference]: Without dead ends: 181 [2021-12-16 03:15:06,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-12-16 03:15:06,649 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 21 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:06,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1264 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-16 03:15:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-16 03:15:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-12-16 03:15:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 119 states have internal predecessors, (142), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-16 03:15:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2021-12-16 03:15:06,656 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 141 [2021-12-16 03:15:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2021-12-16 03:15:06,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-16 03:15:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2021-12-16 03:15:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 03:15:06,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:06,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:06,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 03:15:06,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:06,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:06,872 INFO L85 PathProgramCache]: Analyzing trace with hash -578979924, now seen corresponding path program 1 times [2021-12-16 03:15:06,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:06,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923129031] [2021-12-16 03:15:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:06,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:15:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 03:15:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:15:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-16 03:15:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-16 03:15:07,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923129031] [2021-12-16 03:15:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923129031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769415314] [2021-12-16 03:15:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:07,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:07,149 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 03:15:07,150 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 03:15:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:15:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-16 03:15:07,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769415314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:07,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:07,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-16 03:15:07,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706542227] [2021-12-16 03:15:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:07,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:15:07,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:15:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:15:07,741 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:07,759 INFO L93 Difference]: Finished difference Result 349 states and 476 transitions. [2021-12-16 03:15:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:15:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2021-12-16 03:15:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:07,761 INFO L225 Difference]: With dead ends: 349 [2021-12-16 03:15:07,761 INFO L226 Difference]: Without dead ends: 190 [2021-12-16 03:15:07,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:07,762 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 20 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:07,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 583 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:15:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-16 03:15:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-12-16 03:15:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.209090909090909) internal successors, (133), 111 states have internal predecessors, (133), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (53), 46 states have call predecessors, (53), 46 states have call successors, (53) [2021-12-16 03:15:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2021-12-16 03:15:07,770 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 141 [2021-12-16 03:15:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:07,771 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2021-12-16 03:15:07,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2021-12-16 03:15:07,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 03:15:07,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:07,772 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:07,795 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 03:15:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:07,993 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2073865936, now seen corresponding path program 2 times [2021-12-16 03:15:07,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571660440] [2021-12-16 03:15:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:07,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:15:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 03:15:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:15:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:15:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 03:15:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 03:15:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 03:15:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 03:15:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:15:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 03:15:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-16 03:15:08,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:08,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571660440] [2021-12-16 03:15:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571660440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:08,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480965592] [2021-12-16 03:15:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:15:08,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:08,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:08,412 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 03:15:08,432 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 03:15:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:15:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:15:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:15:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 03:15:09,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:09,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480965592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:09,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:09,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-16 03:15:09,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006830473] [2021-12-16 03:15:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:09,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:09,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:15:09,795 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:15:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:09,905 INFO L93 Difference]: Finished difference Result 337 states and 457 transitions. [2021-12-16 03:15:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 145 [2021-12-16 03:15:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:09,907 INFO L225 Difference]: With dead ends: 337 [2021-12-16 03:15:09,907 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 03:15:09,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:15:09,908 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 12 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:09,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1468 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:15:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 03:15:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-16 03:15:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 116 states have internal predecessors, (137), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-16 03:15:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 244 transitions. [2021-12-16 03:15:09,915 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 244 transitions. Word has length 145 [2021-12-16 03:15:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:09,915 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 244 transitions. [2021-12-16 03:15:09,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:15:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 244 transitions. [2021-12-16 03:15:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-16 03:15:09,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:09,916 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:09,940 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 03:15:10,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:10,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash 183727797, now seen corresponding path program 1 times [2021-12-16 03:15:10,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:10,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816281820] [2021-12-16 03:15:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:10,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:15:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 03:15:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-16 03:15:10,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816281820] [2021-12-16 03:15:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816281820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:10,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54208013] [2021-12-16 03:15:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:10,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:10,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:10,384 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 03:15:10,385 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 03:15:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:15:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 03:15:11,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:11,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54208013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:11,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:11,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-16 03:15:11,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689720167] [2021-12-16 03:15:11,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:11,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:15:11,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:15:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:15:11,015 INFO L87 Difference]: Start difference. First operand 178 states and 244 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:11,039 INFO L93 Difference]: Finished difference Result 347 states and 481 transitions. [2021-12-16 03:15:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:15:11,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-16 03:15:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:11,041 INFO L225 Difference]: With dead ends: 347 [2021-12-16 03:15:11,041 INFO L226 Difference]: Without dead ends: 181 [2021-12-16 03:15:11,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:11,043 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 9 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:11,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 576 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:15:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-16 03:15:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2021-12-16 03:15:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 116 states have internal predecessors, (135), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-16 03:15:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 242 transitions. [2021-12-16 03:15:11,051 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 242 transitions. Word has length 147 [2021-12-16 03:15:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:11,051 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 242 transitions. [2021-12-16 03:15:11,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 242 transitions. [2021-12-16 03:15:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-16 03:15:11,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:11,053 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:11,081 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 03:15:11,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 03:15:11,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -840353543, now seen corresponding path program 1 times [2021-12-16 03:15:11,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246664028] [2021-12-16 03:15:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:11,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:15:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 03:15:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-16 03:15:11,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246664028] [2021-12-16 03:15:11,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246664028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737351246] [2021-12-16 03:15:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:11,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:11,487 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 03:15:11,534 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 03:15:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:11,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:15:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-16 03:15:12,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737351246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:12,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:12,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-16 03:15:12,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24007706] [2021-12-16 03:15:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:15:12,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:15:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:15:12,150 INFO L87 Difference]: Start difference. First operand 178 states and 242 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:12,196 INFO L93 Difference]: Finished difference Result 353 states and 497 transitions. [2021-12-16 03:15:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:15:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-16 03:15:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:12,198 INFO L225 Difference]: With dead ends: 353 [2021-12-16 03:15:12,198 INFO L226 Difference]: Without dead ends: 187 [2021-12-16 03:15:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:12,199 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 34 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 574 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:15:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-16 03:15:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-16 03:15:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 112 states have internal predecessors, (128), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-16 03:15:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2021-12-16 03:15:12,207 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 147 [2021-12-16 03:15:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:12,207 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2021-12-16 03:15:12,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-16 03:15:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2021-12-16 03:15:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-16 03:15:12,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:12,209 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:12,241 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 03:15:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:12,442 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1878938117, now seen corresponding path program 1 times [2021-12-16 03:15:12,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:12,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110265516] [2021-12-16 03:15:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:12,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 03:15:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:15:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:13,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 03:15:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-16 03:15:13,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:13,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110265516] [2021-12-16 03:15:13,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110265516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124864139] [2021-12-16 03:15:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:13,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:13,121 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 03:15:13,163 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 03:15:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 03:15:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:13,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:15:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-12-16 03:15:14,044 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 24 treesize of output 16 [2021-12-16 03:15:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 03:15:14,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:15:15,187 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 28 treesize of output 26 [2021-12-16 03:15:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-16 03:15:15,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124864139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:15:15,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:15:15,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 37 [2021-12-16 03:15:15,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004632419] [2021-12-16 03:15:15,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:15:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-16 03:15:15,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-16 03:15:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 03:15:15,462 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) [2021-12-16 03:15:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:26,586 INFO L93 Difference]: Finished difference Result 857 states and 1491 transitions. [2021-12-16 03:15:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-16 03:15:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) Word has length 147 [2021-12-16 03:15:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:26,595 INFO L225 Difference]: With dead ends: 857 [2021-12-16 03:15:26,596 INFO L226 Difference]: Without dead ends: 744 [2021-12-16 03:15:26,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 321 SyntacticMatches, 12 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3354 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1072, Invalid=10918, Unknown=0, NotChecked=0, Total=11990 [2021-12-16 03:15:26,603 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 706 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 11792 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 14967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 11792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2078 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:26,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 3363 Invalid, 14967 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1097 Valid, 11792 Invalid, 0 Unknown, 2078 Unchecked, 8.5s Time] [2021-12-16 03:15:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-16 03:15:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 306. [2021-12-16 03:15:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 200 states have (on average 1.135) internal successors, (227), 207 states have internal predecessors, (227), 79 states have call successors, (79), 19 states have call predecessors, (79), 26 states have return successors, (152), 79 states have call predecessors, (152), 78 states have call successors, (152) [2021-12-16 03:15:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 458 transitions. [2021-12-16 03:15:26,651 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 458 transitions. Word has length 147 [2021-12-16 03:15:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:26,652 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 458 transitions. [2021-12-16 03:15:26,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) [2021-12-16 03:15:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 458 transitions. [2021-12-16 03:15:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-16 03:15:26,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:26,654 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:15:26,676 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 03:15:26,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 03:15:26,876 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1570252345, now seen corresponding path program 2 times [2021-12-16 03:15:26,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:26,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638478669] [2021-12-16 03:15:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:26,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:15:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 03:15:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 03:15:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 03:15:27,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638478669] [2021-12-16 03:15:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638478669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529965967] [2021-12-16 03:15:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:15:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:27,190 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 03:15:27,191 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 03:15:27,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:15:27,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:15:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2864 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:15:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 03:15:28,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529965967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:28,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-16 03:15:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456733536] [2021-12-16 03:15:28,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:15:28,247 INFO L87 Difference]: Start difference. First operand 306 states and 458 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:15:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:28,360 INFO L93 Difference]: Finished difference Result 502 states and 743 transitions. [2021-12-16 03:15:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-16 03:15:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:28,363 INFO L225 Difference]: With dead ends: 502 [2021-12-16 03:15:28,363 INFO L226 Difference]: Without dead ends: 315 [2021-12-16 03:15:28,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:15:28,364 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 12 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:28,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1465 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:15:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-16 03:15:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 306. [2021-12-16 03:15:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 200 states have (on average 1.135) internal successors, (227), 207 states have internal predecessors, (227), 79 states have call successors, (79), 19 states have call predecessors, (79), 26 states have return successors, (143), 79 states have call predecessors, (143), 78 states have call successors, (143) [2021-12-16 03:15:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 449 transitions. [2021-12-16 03:15:28,381 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 449 transitions. Word has length 151 [2021-12-16 03:15:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:28,381 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 449 transitions. [2021-12-16 03:15:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 03:15:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 449 transitions. [2021-12-16 03:15:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-16 03:15:28,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:28,383 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:28,406 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 03:15:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 03:15:28,606 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -497287792, now seen corresponding path program 1 times [2021-12-16 03:15:28,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:28,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27132137] [2021-12-16 03:15:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:28,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:15:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 03:15:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-16 03:15:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-16 03:15:29,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27132137] [2021-12-16 03:15:29,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27132137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:29,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052772771] [2021-12-16 03:15:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:29,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:29,256 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 03:15:29,257 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 03:15:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-16 03:15:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:15:30,297 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 03:15:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-16 03:15:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:15:30,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:15:30,428 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 03:15:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 102 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 03:15:31,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:15:40,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 03:15:40,670 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-16 03:15:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052772771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:40,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:15:40,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 44 [2021-12-16 03:15:40,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771212937] [2021-12-16 03:15:40,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:15:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-16 03:15:40,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-16 03:15:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3821, Unknown=4, NotChecked=0, Total=4032 [2021-12-16 03:15:40,735 INFO L87 Difference]: Start difference. First operand 306 states and 449 transitions. Second operand has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) [2021-12-16 03:15:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:50,582 INFO L93 Difference]: Finished difference Result 1081 states and 1832 transitions. [2021-12-16 03:15:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-16 03:15:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) Word has length 153 [2021-12-16 03:15:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:50,589 INFO L225 Difference]: With dead ends: 1081 [2021-12-16 03:15:50,589 INFO L226 Difference]: Without dead ends: 872 [2021-12-16 03:15:50,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 248 SyntacticMatches, 10 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4787 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1581, Invalid=16237, Unknown=4, NotChecked=0, Total=17822 [2021-12-16 03:15:50,594 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 709 mSDsluCounter, 3211 mSDsCounter, 0 mSdLazyCounter, 8837 mSolverCounterSat, 1046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 12665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1046 IncrementalHoareTripleChecker+Valid, 8837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2782 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:50,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 3526 Invalid, 12665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1046 Valid, 8837 Invalid, 0 Unknown, 2782 Unchecked, 5.8s Time] [2021-12-16 03:15:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-12-16 03:15:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 690. [2021-12-16 03:15:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 432 states have (on average 1.1319444444444444) internal successors, (489), 446 states have internal predecessors, (489), 210 states have call successors, (210), 34 states have call predecessors, (210), 47 states have return successors, (407), 209 states have call predecessors, (407), 208 states have call successors, (407) [2021-12-16 03:15:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1106 transitions. [2021-12-16 03:15:50,642 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1106 transitions. Word has length 153 [2021-12-16 03:15:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1106 transitions. [2021-12-16 03:15:50,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) [2021-12-16 03:15:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1106 transitions. [2021-12-16 03:15:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-16 03:15:50,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:50,656 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:15:50,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-16 03:15:50,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 03:15:50,874 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1975774423, now seen corresponding path program 1 times [2021-12-16 03:15:50,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:50,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222441611] [2021-12-16 03:15:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:50,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:15:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 03:15:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-16 03:15:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 03:15:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-16 03:15:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-16 03:15:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-16 03:15:51,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222441611] [2021-12-16 03:15:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222441611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468447811] [2021-12-16 03:15:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:51,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:51,296 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 03:15:51,299 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 03:15:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:15:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 03:15:52,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:52,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468447811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:52,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:52,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-16 03:15:52,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48784063] [2021-12-16 03:15:52,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:52,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:52,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:15:52,041 INFO L87 Difference]: Start difference. First operand 690 states and 1106 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-16 03:15:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:52,162 INFO L93 Difference]: Finished difference Result 988 states and 1575 transitions. [2021-12-16 03:15:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 158 [2021-12-16 03:15:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:52,167 INFO L225 Difference]: With dead ends: 988 [2021-12-16 03:15:52,167 INFO L226 Difference]: Without dead ends: 591 [2021-12-16 03:15:52,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:15:52,171 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 12 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:52,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1449 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:15:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-12-16 03:15:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 570. [2021-12-16 03:15:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 364 states have (on average 1.1373626373626373) internal successors, (414), 374 states have internal predecessors, (414), 162 states have call successors, (162), 34 states have call predecessors, (162), 43 states have return successors, (295), 161 states have call predecessors, (295), 160 states have call successors, (295) [2021-12-16 03:15:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 871 transitions. [2021-12-16 03:15:52,202 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 871 transitions. Word has length 158 [2021-12-16 03:15:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:52,204 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 871 transitions. [2021-12-16 03:15:52,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-16 03:15:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 871 transitions. [2021-12-16 03:15:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-16 03:15:52,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:52,207 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:52,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 03:15:52,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:15:52,424 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 556815500, now seen corresponding path program 3 times [2021-12-16 03:15:52,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:52,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711096408] [2021-12-16 03:15:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:52,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:15:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:15:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:15:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:15:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:15:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:15:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:15:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 03:15:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:15:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 03:15:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:15:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 03:15:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 03:15:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-16 03:15:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-16 03:15:53,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711096408] [2021-12-16 03:15:53,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711096408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064305190] [2021-12-16 03:15:53,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:15:53,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:53,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:53,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:15:53,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process