./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:14:20,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:14:20,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:14:20,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:14:20,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:14:20,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:14:20,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:14:20,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:14:20,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:14:20,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:14:20,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:14:20,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:14:20,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:14:20,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:14:20,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:14:20,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:14:20,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:14:20,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:14:20,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:14:20,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:14:20,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:14:20,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:14:20,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:14:20,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:14:20,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:14:20,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:14:20,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:14:20,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:14:20,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:14:20,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:14:20,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:14:20,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:14:20,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:14:20,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:14:20,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:14:20,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:14:20,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:14:20,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:14:20,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:14:20,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:14:20,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:14:20,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:14:20,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:14:20,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:14:20,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:14:20,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:14:20,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:14:20,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:14:20,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:14:20,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:14:20,897 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:14:20,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:14:20,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:14:20,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:14:20,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:14:20,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:14:20,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:14:20,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:14:20,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:14:20,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:14:20,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:14:20,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:14:20,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-12-28 03:14:21,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:14:21,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:14:21,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:14:21,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:14:21,168 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:14:21,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-28 03:14:21,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce53b6047/84549a11cc7c4fe585142e1bc4d472d1/FLAGcaabb6d31 [2021-12-28 03:14:21,896 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:14:21,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-28 03:14:21,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce53b6047/84549a11cc7c4fe585142e1bc4d472d1/FLAGcaabb6d31 [2021-12-28 03:14:22,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce53b6047/84549a11cc7c4fe585142e1bc4d472d1 [2021-12-28 03:14:22,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:14:22,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:14:22,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:14:22,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:14:22,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:14:22,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:14:22" (1/1) ... [2021-12-28 03:14:22,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d87f08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:22, skipping insertion in model container [2021-12-28 03:14:22,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:14:22" (1/1) ... [2021-12-28 03:14:22,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:14:22,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:14:22,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-28 03:14:22,477 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-28 03:14:23,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,141 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,353 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:14:23,354 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:14:23,355 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:14:23,356 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:14:23,357 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:14:23,357 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:14:23,358 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:14:23,358 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:14:23,358 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:14:23,359 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:14:23,438 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:14:23,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:14:23,586 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:14:23,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-28 03:14:23,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-28 03:14:23,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,646 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,648 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,648 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,667 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:14:23,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:14:23,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:14:23,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:14:23,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:14:23,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:14:23,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:14:23,671 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:14:23,671 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:14:23,671 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:14:23,724 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:14:23,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:14:23,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:14:24,019 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:14:24,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24 WrapperNode [2021-12-28 03:14:24,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:14:24,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:14:24,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:14:24,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:14:24,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,165 INFO L137 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2021-12-28 03:14:24,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:14:24,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:14:24,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:14:24,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:14:24,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:14:24,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:14:24,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:14:24,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:14:24,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (1/1) ... [2021-12-28 03:14:24,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:14:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:24,306 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) [2021-12-28 03:14:24,326 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 [2021-12-28 03:14:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-28 03:14:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-28 03:14:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-12-28 03:14:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-12-28 03:14:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:14:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:14:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:14:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:14:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:14:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:14:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:14:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:14:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-28 03:14:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-28 03:14:24,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:14:24,340 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-28 03:14:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-28 03:14:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:14:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:14:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:14:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:14:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-28 03:14:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-28 03:14:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:14:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:14:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:14:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:14:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:14:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:14:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:14:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-12-28 03:14:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-12-28 03:14:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:14:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-12-28 03:14:24,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-12-28 03:14:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:14:24,565 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:14:24,568 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:14:25,303 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:14:25,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:14:25,308 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 03:14:25,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:14:25 BoogieIcfgContainer [2021-12-28 03:14:25,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:14:25,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:14:25,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:14:25,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:14:25,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:14:22" (1/3) ... [2021-12-28 03:14:25,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523adbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:14:25, skipping insertion in model container [2021-12-28 03:14:25,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:14:24" (2/3) ... [2021-12-28 03:14:25,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523adbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:14:25, skipping insertion in model container [2021-12-28 03:14:25,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:14:25" (3/3) ... [2021-12-28 03:14:25,315 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-12-28 03:14:25,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:14:25,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:14:25,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:14:25,350 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 [2021-12-28 03:14:25,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:14:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-28 03:14:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 03:14:25,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:25,371 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] [2021-12-28 03:14:25,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1731481966, now seen corresponding path program 1 times [2021-12-28 03:14:25,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:25,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109123910] [2021-12-28 03:14:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:25,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:14:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:25,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-28 03:14:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-28 03:14:26,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:26,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109123910] [2021-12-28 03:14:26,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109123910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:26,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:14:26,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:14:26,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661161379] [2021-12-28 03:14:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:26,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:14:26,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:14:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:14:26,092 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-28 03:14:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:26,404 INFO L93 Difference]: Finished difference Result 284 states and 410 transitions. [2021-12-28 03:14:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:14:26,407 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 [2021-12-28 03:14:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:26,413 INFO L225 Difference]: With dead ends: 284 [2021-12-28 03:14:26,413 INFO L226 Difference]: Without dead ends: 140 [2021-12-28 03:14:26,417 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 [2021-12-28 03:14:26,419 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:26,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 208 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:14:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-28 03:14:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-12-28 03:14:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-28 03:14:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-12-28 03:14:26,477 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2021-12-28 03:14:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:26,477 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-12-28 03:14:26,477 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) [2021-12-28 03:14:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-12-28 03:14:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 03:14:26,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:26,485 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] [2021-12-28 03:14:26,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:14:26,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash 57376236, now seen corresponding path program 1 times [2021-12-28 03:14:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649332052] [2021-12-28 03:14:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:26,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:14:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-28 03:14:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-28 03:14:26,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:26,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649332052] [2021-12-28 03:14:26,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649332052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:26,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703186319] [2021-12-28 03:14:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:26,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:26,876 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) [2021-12-28 03:14:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:14:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:14:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 03:14:27,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:27,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703186319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:27,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:27,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-28 03:14:27,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051046145] [2021-12-28 03:14:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:27,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:14:27,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:14:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:14:27,579 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:14:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:27,788 INFO L93 Difference]: Finished difference Result 272 states and 367 transitions. [2021-12-28 03:14:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:14:27,789 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 [2021-12-28 03:14:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:27,791 INFO L225 Difference]: With dead ends: 272 [2021-12-28 03:14:27,791 INFO L226 Difference]: Without dead ends: 141 [2021-12-28 03:14:27,793 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 [2021-12-28 03:14:27,793 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 196 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:27,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 415 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:14:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-28 03:14:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-28 03:14:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (47), 41 states have call predecessors, (47), 41 states have call successors, (47) [2021-12-28 03:14:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2021-12-28 03:14:27,807 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 113 [2021-12-28 03:14:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:27,807 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2021-12-28 03:14:27,807 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) [2021-12-28 03:14:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2021-12-28 03:14:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-28 03:14:27,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:27,809 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] [2021-12-28 03:14:27,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:28,024 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 [2021-12-28 03:14:28,024 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash -590863305, now seen corresponding path program 1 times [2021-12-28 03:14:28,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991673763] [2021-12-28 03:14:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:28,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 03:14:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-28 03:14:28,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991673763] [2021-12-28 03:14:28,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991673763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168821222] [2021-12-28 03:14:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:28,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:28,410 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) [2021-12-28 03:14:28,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:14:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:28,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:14:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-28 03:14:29,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168821222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:29,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:29,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-28 03:14:29,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133883785] [2021-12-28 03:14:29,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:29,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:14:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:14:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:14:29,086 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 03:14:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:29,269 INFO L93 Difference]: Finished difference Result 227 states and 311 transitions. [2021-12-28 03:14:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:14:29,269 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 [2021-12-28 03:14:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:29,271 INFO L225 Difference]: With dead ends: 227 [2021-12-28 03:14:29,271 INFO L226 Difference]: Without dead ends: 141 [2021-12-28 03:14:29,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:14:29,273 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 203 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:29,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 550 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:14:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-28 03:14:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-28 03:14:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-12-28 03:14:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2021-12-28 03:14:29,283 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 119 [2021-12-28 03:14:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:29,283 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2021-12-28 03:14:29,283 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) [2021-12-28 03:14:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2021-12-28 03:14:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-28 03:14:29,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:29,285 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] [2021-12-28 03:14:29,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:29,505 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 [2021-12-28 03:14:29,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1636756019, now seen corresponding path program 2 times [2021-12-28 03:14:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583861815] [2021-12-28 03:14:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:14:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 03:14:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:14:29,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583861815] [2021-12-28 03:14:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583861815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631069855] [2021-12-28 03:14:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:14:29,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:29,836 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) [2021-12-28 03:14:29,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:14:30,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:14:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:14:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:14:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-28 03:14:30,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:30,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631069855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:30,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:30,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-28 03:14:30,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796225884] [2021-12-28 03:14:30,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:30,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:14:30,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:14:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:14:30,409 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-28 03:14:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:30,472 INFO L93 Difference]: Finished difference Result 153 states and 209 transitions. [2021-12-28 03:14:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:14:30,473 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 [2021-12-28 03:14:30,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:30,476 INFO L225 Difference]: With dead ends: 153 [2021-12-28 03:14:30,476 INFO L226 Difference]: Without dead ends: 151 [2021-12-28 03:14:30,476 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 [2021-12-28 03:14:30,479 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:30,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1262 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:14:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-28 03:14:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-28 03:14:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 94 states have internal predecessors, (109), 43 states have call successors, (43), 13 states have call predecessors, (43), 15 states have return successors, (54), 42 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-28 03:14:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-12-28 03:14:30,503 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 131 [2021-12-28 03:14:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-12-28 03:14:30,504 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) [2021-12-28 03:14:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-12-28 03:14:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 03:14:30,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:30,505 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] [2021-12-28 03:14:30,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:30,726 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 [2021-12-28 03:14:30,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1157375339, now seen corresponding path program 1 times [2021-12-28 03:14:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496508265] [2021-12-28 03:14:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:30,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:14:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 03:14:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 03:14:31,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:31,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496508265] [2021-12-28 03:14:31,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496508265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:31,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583670456] [2021-12-28 03:14:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:31,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:31,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:31,043 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) [2021-12-28 03:14:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:14:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:31,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:14:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 03:14:31,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:31,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583670456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:31,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:31,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-28 03:14:31,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259608270] [2021-12-28 03:14:31,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:31,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:14:31,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:14:31,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:14:31,725 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 03:14:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:31,897 INFO L93 Difference]: Finished difference Result 260 states and 358 transitions. [2021-12-28 03:14:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:14:31,899 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 [2021-12-28 03:14:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:31,900 INFO L225 Difference]: With dead ends: 260 [2021-12-28 03:14:31,900 INFO L226 Difference]: Without dead ends: 147 [2021-12-28 03:14:31,900 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 [2021-12-28 03:14:31,901 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 202 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 550 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:14:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-28 03:14:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-28 03:14:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 91 states have internal predecessors, (106), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-28 03:14:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2021-12-28 03:14:31,909 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 135 [2021-12-28 03:14:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:31,909 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2021-12-28 03:14:31,909 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) [2021-12-28 03:14:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2021-12-28 03:14:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-28 03:14:31,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:31,911 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] [2021-12-28 03:14:31,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:32,135 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 [2021-12-28 03:14:32,136 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 707842976, now seen corresponding path program 1 times [2021-12-28 03:14:32,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460310464] [2021-12-28 03:14:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:32,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:14:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 03:14:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-28 03:14:32,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460310464] [2021-12-28 03:14:32,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460310464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:32,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:14:32,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:14:32,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042377790] [2021-12-28 03:14:32,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:32,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:14:32,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:14:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:14:32,619 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-28 03:14:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:33,097 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2021-12-28 03:14:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:14:33,098 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 [2021-12-28 03:14:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:33,101 INFO L225 Difference]: With dead ends: 314 [2021-12-28 03:14:33,101 INFO L226 Difference]: Without dead ends: 174 [2021-12-28 03:14:33,102 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 [2021-12-28 03:14:33,102 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 242 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:33,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 309 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:14:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-28 03:14:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-12-28 03:14:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-28 03:14:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-12-28 03:14:33,115 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 206 transitions. Word has length 141 [2021-12-28 03:14:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:33,115 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-12-28 03:14:33,116 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) [2021-12-28 03:14:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 206 transitions. [2021-12-28 03:14:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-28 03:14:33,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:33,117 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] [2021-12-28 03:14:33,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:14:33,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 966008414, now seen corresponding path program 1 times [2021-12-28 03:14:33,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:33,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296567641] [2021-12-28 03:14:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:33,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:14:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 03:14:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-28 03:14:33,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:33,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296567641] [2021-12-28 03:14:33,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296567641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:33,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354078823] [2021-12-28 03:14:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:33,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:33,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:33,817 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) [2021-12-28 03:14:33,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:14:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 03:14:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:34,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:14:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-28 03:14:34,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354078823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:34,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:34,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2021-12-28 03:14:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60702050] [2021-12-28 03:14:34,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 03:14:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 03:14:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-12-28 03:14:34,778 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-28 03:14:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:34,875 INFO L93 Difference]: Finished difference Result 320 states and 429 transitions. [2021-12-28 03:14:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 03:14:34,876 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 [2021-12-28 03:14:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:34,878 INFO L225 Difference]: With dead ends: 320 [2021-12-28 03:14:34,878 INFO L226 Difference]: Without dead ends: 171 [2021-12-28 03:14:34,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-12-28 03:14:34,879 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 25 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:34,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1172 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-28 03:14:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-28 03:14:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-28 03:14:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-28 03:14:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 229 transitions. [2021-12-28 03:14:34,894 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 229 transitions. Word has length 141 [2021-12-28 03:14:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 229 transitions. [2021-12-28 03:14:34,894 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) [2021-12-28 03:14:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 229 transitions. [2021-12-28 03:14:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-28 03:14:34,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:34,896 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] [2021-12-28 03:14:34,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:35,111 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 [2021-12-28 03:14:35,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1067385632, now seen corresponding path program 1 times [2021-12-28 03:14:35,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:35,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828944625] [2021-12-28 03:14:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:35,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:14:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 03:14:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:14:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 03:14:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-28 03:14:35,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828944625] [2021-12-28 03:14:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828944625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269333203] [2021-12-28 03:14:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:35,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:35,374 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) [2021-12-28 03:14:35,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:14:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:35,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:14:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-28 03:14:35,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:35,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269333203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:35,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:35,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-28 03:14:35,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614697660] [2021-12-28 03:14:35,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:35,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:14:35,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:14:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:14:35,923 INFO L87 Difference]: Start difference. First operand 171 states and 229 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-28 03:14:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:35,945 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2021-12-28 03:14:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:14:35,946 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 [2021-12-28 03:14:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:35,947 INFO L225 Difference]: With dead ends: 329 [2021-12-28 03:14:35,947 INFO L226 Difference]: Without dead ends: 180 [2021-12-28 03:14:35,948 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 [2021-12-28 03:14:35,948 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:35,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 541 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:14:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-28 03:14:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2021-12-28 03:14:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 106 states have internal predecessors, (127), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-28 03:14:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 219 transitions. [2021-12-28 03:14:35,956 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 219 transitions. Word has length 141 [2021-12-28 03:14:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:35,957 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 219 transitions. [2021-12-28 03:14:35,957 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) [2021-12-28 03:14:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 219 transitions. [2021-12-28 03:14:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 03:14:35,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:35,958 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] [2021-12-28 03:14:35,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:36,171 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 [2021-12-28 03:14:36,171 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -707487644, now seen corresponding path program 2 times [2021-12-28 03:14:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949379141] [2021-12-28 03:14:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 03:14:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:14:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:14:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:14:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:14:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:14:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 03:14:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-28 03:14:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 03:14:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 03:14:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-28 03:14:36,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949379141] [2021-12-28 03:14:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949379141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108498331] [2021-12-28 03:14:36,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:14:36,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:36,484 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) [2021-12-28 03:14:36,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:14:37,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:14:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:14:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 03:14:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-28 03:14:37,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108498331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:37,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-28 03:14:37,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801160198] [2021-12-28 03:14:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:37,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:14:37,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:14:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:14:37,700 INFO L87 Difference]: Start difference. First operand 163 states and 219 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:14:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:37,795 INFO L93 Difference]: Finished difference Result 317 states and 429 transitions. [2021-12-28 03:14:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:14:37,795 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 [2021-12-28 03:14:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:37,797 INFO L225 Difference]: With dead ends: 317 [2021-12-28 03:14:37,797 INFO L226 Difference]: Without dead ends: 168 [2021-12-28 03:14:37,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:14:37,799 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:37,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1366 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:14:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-28 03:14:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-28 03:14:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 109 states have (on average 1.201834862385321) internal successors, (131), 111 states have internal predecessors, (131), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-28 03:14:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 230 transitions. [2021-12-28 03:14:37,809 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 230 transitions. Word has length 145 [2021-12-28 03:14:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:37,810 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 230 transitions. [2021-12-28 03:14:37,810 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) [2021-12-28 03:14:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 230 transitions. [2021-12-28 03:14:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 03:14:37,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:37,813 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] [2021-12-28 03:14:37,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:38,026 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 [2021-12-28 03:14:38,028 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash 434192105, now seen corresponding path program 1 times [2021-12-28 03:14:38,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:38,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678815627] [2021-12-28 03:14:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:38,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 03:14:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:14:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-28 03:14:38,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678815627] [2021-12-28 03:14:38,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678815627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948926899] [2021-12-28 03:14:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:38,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:38,252 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) [2021-12-28 03:14:38,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:14:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:14:38,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-28 03:14:38,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948926899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:38,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:38,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-28 03:14:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584516091] [2021-12-28 03:14:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:14:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:14:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:14:38,858 INFO L87 Difference]: Start difference. First operand 168 states and 230 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-28 03:14:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:38,881 INFO L93 Difference]: Finished difference Result 327 states and 453 transitions. [2021-12-28 03:14:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:14:38,882 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 [2021-12-28 03:14:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:38,882 INFO L225 Difference]: With dead ends: 327 [2021-12-28 03:14:38,883 INFO L226 Difference]: Without dead ends: 171 [2021-12-28 03:14:38,883 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 [2021-12-28 03:14:38,884 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:38,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 534 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:14:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-28 03:14:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-12-28 03:14:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 109 states have (on average 1.18348623853211) internal successors, (129), 111 states have internal predecessors, (129), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-28 03:14:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 228 transitions. [2021-12-28 03:14:38,891 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 228 transitions. Word has length 147 [2021-12-28 03:14:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 228 transitions. [2021-12-28 03:14:38,891 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) [2021-12-28 03:14:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 228 transitions. [2021-12-28 03:14:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 03:14:38,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:38,892 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] [2021-12-28 03:14:38,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:39,111 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 [2021-12-28 03:14:39,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -589889235, now seen corresponding path program 1 times [2021-12-28 03:14:39,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276346348] [2021-12-28 03:14:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:39,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 03:14:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:14:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-28 03:14:39,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276346348] [2021-12-28 03:14:39,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276346348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972634564] [2021-12-28 03:14:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:39,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:39,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:39,379 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) [2021-12-28 03:14:39,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:14:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:14:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-28 03:14:39,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:14:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972634564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:14:39,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:14:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-28 03:14:39,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844362136] [2021-12-28 03:14:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:14:39,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:14:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:14:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:14:39,972 INFO L87 Difference]: Start difference. First operand 168 states and 228 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-28 03:14:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:14:39,991 INFO L93 Difference]: Finished difference Result 333 states and 469 transitions. [2021-12-28 03:14:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:14:39,991 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 [2021-12-28 03:14:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:14:39,993 INFO L225 Difference]: With dead ends: 333 [2021-12-28 03:14:39,993 INFO L226 Difference]: Without dead ends: 177 [2021-12-28 03:14:39,993 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 [2021-12-28 03:14:39,994 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 34 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:14:39,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:14:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-28 03:14:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-12-28 03:14:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.161904761904762) internal successors, (122), 107 states have internal predecessors, (122), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-28 03:14:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 221 transitions. [2021-12-28 03:14:40,002 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 221 transitions. Word has length 147 [2021-12-28 03:14:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:14:40,003 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 221 transitions. [2021-12-28 03:14:40,003 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) [2021-12-28 03:14:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 221 transitions. [2021-12-28 03:14:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 03:14:40,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:14:40,004 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] [2021-12-28 03:14:40,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:14:40,225 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 [2021-12-28 03:14:40,225 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:14:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:14:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1628473809, now seen corresponding path program 1 times [2021-12-28 03:14:40,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:14:40,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053196931] [2021-12-28 03:14:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:40,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:14:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:14:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:14:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:14:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:14:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:14:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:14:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:14:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:14:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:14:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:14:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:14:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 03:14:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 03:14:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:14:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:14:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:14:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-28 03:14:40,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:14:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053196931] [2021-12-28 03:14:40,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053196931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105417825] [2021-12-28 03:14:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:14:40,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:14:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:14:40,843 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) [2021-12-28 03:14:40,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:14:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:14:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-28 03:14:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:14:41,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 03:14:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:14:41,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 53 [2021-12-28 03:14:48,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2021-12-28 03:14:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 74 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:14:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:14:52,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105417825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:14:52,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:14:52,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-12-28 03:14:52,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941819923] [2021-12-28 03:14:52,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:14:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-28 03:14:52,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:14:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-28 03:14:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1011, Unknown=4, NotChecked=0, Total=1122 [2021-12-28 03:14:52,200 INFO L87 Difference]: Start difference. First operand 164 states and 221 transitions. Second operand has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-28 03:15:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:00,204 INFO L93 Difference]: Finished difference Result 501 states and 825 transitions. [2021-12-28 03:15:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-28 03:15:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) Word has length 147 [2021-12-28 03:15:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:00,207 INFO L225 Difference]: With dead ends: 501 [2021-12-28 03:15:00,207 INFO L226 Difference]: Without dead ends: 415 [2021-12-28 03:15:00,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 257 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=466, Invalid=3550, Unknown=16, NotChecked=0, Total=4032 [2021-12-28 03:15:00,209 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 284 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 4423 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 5752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1080 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:00,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1180 Invalid, 5752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4423 Invalid, 0 Unknown, 1080 Unchecked, 3.3s Time] [2021-12-28 03:15:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-28 03:15:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 265. [2021-12-28 03:15:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 184 states have internal predecessors, (207), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (110), 61 states have call predecessors, (110), 61 states have call successors, (110) [2021-12-28 03:15:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 379 transitions. [2021-12-28 03:15:00,237 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 379 transitions. Word has length 147 [2021-12-28 03:15:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:00,237 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 379 transitions. [2021-12-28 03:15:00,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 5.434782608695652) internal successors, (125), 24 states have internal predecessors, (125), 15 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 10 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-28 03:15:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 379 transitions. [2021-12-28 03:15:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-28 03:15:00,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:00,239 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:00,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:00,455 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 [2021-12-28 03:15:00,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 180046649, now seen corresponding path program 1 times [2021-12-28 03:15:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547287205] [2021-12-28 03:15:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:00,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:15:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:15:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:15:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:15:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 03:15:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 03:15:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 03:15:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 03:15:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 03:15:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-28 03:15:00,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547287205] [2021-12-28 03:15:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547287205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252168541] [2021-12-28 03:15:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:00,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:00,836 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) [2021-12-28 03:15:00,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:15:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 03:15:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-28 03:15:01,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252168541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:01,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:01,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-28 03:15:01,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622598746] [2021-12-28 03:15:01,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:01,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:01,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:15:01,492 INFO L87 Difference]: Start difference. First operand 265 states and 379 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:15:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:01,608 INFO L93 Difference]: Finished difference Result 457 states and 652 transitions. [2021-12-28 03:15:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:01,611 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 [2021-12-28 03:15:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:01,613 INFO L225 Difference]: With dead ends: 457 [2021-12-28 03:15:01,613 INFO L226 Difference]: Without dead ends: 269 [2021-12-28 03:15:01,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:01,615 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:01,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1363 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-28 03:15:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-28 03:15:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 188 states have internal predecessors, (210), 62 states have call successors, (62), 19 states have call predecessors, (62), 24 states have return successors, (109), 61 states have call predecessors, (109), 61 states have call successors, (109) [2021-12-28 03:15:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 381 transitions. [2021-12-28 03:15:01,634 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 381 transitions. Word has length 151 [2021-12-28 03:15:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:01,635 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 381 transitions. [2021-12-28 03:15:01,636 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) [2021-12-28 03:15:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 381 transitions. [2021-12-28 03:15:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-28 03:15:01,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:01,638 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:01,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:01,851 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 [2021-12-28 03:15:01,851 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 54404409, now seen corresponding path program 2 times [2021-12-28 03:15:01,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771098553] [2021-12-28 03:15:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:01,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:15:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:15:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:15:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:15:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:15:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:15:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 03:15:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 03:15:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 03:15:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-28 03:15:02,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771098553] [2021-12-28 03:15:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771098553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116774672] [2021-12-28 03:15:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:02,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:02,191 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) [2021-12-28 03:15:02,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:15:03,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:15:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 03:15:03,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-28 03:15:03,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116774672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:03,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:03,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-28 03:15:03,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029339805] [2021-12-28 03:15:03,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:03,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:03,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:15:03,347 INFO L87 Difference]: Start difference. First operand 269 states and 381 transitions. Second operand has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:15:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:03,464 INFO L93 Difference]: Finished difference Result 420 states and 593 transitions. [2021-12-28 03:15:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-28 03:15:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:03,467 INFO L225 Difference]: With dead ends: 420 [2021-12-28 03:15:03,467 INFO L226 Difference]: Without dead ends: 259 [2021-12-28 03:15:03,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:03,468 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 12 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:03,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1355 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-28 03:15:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-12-28 03:15:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 173 states have (on average 1.138728323699422) internal successors, (197), 178 states have internal predecessors, (197), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (104), 61 states have call predecessors, (104), 61 states have call successors, (104) [2021-12-28 03:15:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 363 transitions. [2021-12-28 03:15:03,482 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 363 transitions. Word has length 151 [2021-12-28 03:15:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:03,483 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 363 transitions. [2021-12-28 03:15:03,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 03:15:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 363 transitions. [2021-12-28 03:15:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-28 03:15:03,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:03,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:03,709 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 [2021-12-28 03:15:03,709 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1164816066, now seen corresponding path program 1 times [2021-12-28 03:15:03,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:03,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033370853] [2021-12-28 03:15:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:03,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:15:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:15:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:15:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:15:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:15:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:15:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 03:15:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 03:15:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 03:15:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-28 03:15:04,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033370853] [2021-12-28 03:15:04,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033370853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311991340] [2021-12-28 03:15:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:04,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:04,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:04,464 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) [2021-12-28 03:15:04,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:15:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-28 03:15:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:05,326 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-28 03:15:05,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2021-12-28 03:15:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 03:15:06,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:06,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-28 03:15:06,721 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-28 03:15:06,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-28 03:15:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-28 03:15:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311991340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:06,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 36 [2021-12-28 03:15:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575641954] [2021-12-28 03:15:06,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 03:15:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 03:15:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 03:15:06,801 INFO L87 Difference]: Start difference. First operand 259 states and 363 transitions. Second operand has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-28 03:15:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:09,920 INFO L93 Difference]: Finished difference Result 573 states and 762 transitions. [2021-12-28 03:15:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-28 03:15:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) Word has length 153 [2021-12-28 03:15:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:09,931 INFO L225 Difference]: With dead ends: 573 [2021-12-28 03:15:09,932 INFO L226 Difference]: Without dead ends: 387 [2021-12-28 03:15:09,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 331 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=707, Invalid=4260, Unknown=3, NotChecked=0, Total=4970 [2021-12-28 03:15:09,934 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 456 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 3797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1182 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:09,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1118 Invalid, 3797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2355 Invalid, 0 Unknown, 1182 Unchecked, 1.7s Time] [2021-12-28 03:15:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-28 03:15:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 349. [2021-12-28 03:15:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 246 states have (on average 1.113821138211382) internal successors, (274), 255 states have internal predecessors, (274), 70 states have call successors, (70), 24 states have call predecessors, (70), 32 states have return successors, (120), 69 states have call predecessors, (120), 69 states have call successors, (120) [2021-12-28 03:15:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 464 transitions. [2021-12-28 03:15:09,952 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 464 transitions. Word has length 153 [2021-12-28 03:15:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 464 transitions. [2021-12-28 03:15:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-28 03:15:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 464 transitions. [2021-12-28 03:15:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-28 03:15:09,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:09,954 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:10,167 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 [2021-12-28 03:15:10,167 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 657359874, now seen corresponding path program 2 times [2021-12-28 03:15:10,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:10,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287267493] [2021-12-28 03:15:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:10,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:15:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:15:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:15:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 03:15:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:15:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:15:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 03:15:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 03:15:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 03:15:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-28 03:15:10,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287267493] [2021-12-28 03:15:10,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287267493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708055311] [2021-12-28 03:15:10,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:10,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:10,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:10,933 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) [2021-12-28 03:15:10,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:15:12,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:15:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 03:15:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 104 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-28 03:15:13,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-28 03:15:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708055311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:13,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:13,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 38 [2021-12-28 03:15:13,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142307690] [2021-12-28 03:15:13,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:13,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-28 03:15:13,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-28 03:15:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 03:15:13,617 INFO L87 Difference]: Start difference. First operand 349 states and 464 transitions. Second operand has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-28 03:15:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:21,423 INFO L93 Difference]: Finished difference Result 784 states and 1174 transitions. [2021-12-28 03:15:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-28 03:15:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) Word has length 153 [2021-12-28 03:15:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:21,436 INFO L225 Difference]: With dead ends: 784 [2021-12-28 03:15:21,436 INFO L226 Difference]: Without dead ends: 678 [2021-12-28 03:15:21,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 327 SyntacticMatches, 16 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=940, Invalid=8566, Unknown=0, NotChecked=0, Total=9506 [2021-12-28 03:15:21,439 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 530 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 7123 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 9340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 7123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1352 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 1481 Invalid, 9340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 7123 Invalid, 0 Unknown, 1352 Unchecked, 5.4s Time] [2021-12-28 03:15:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-28 03:15:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 476. [2021-12-28 03:15:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 340 states have (on average 1.1264705882352941) internal successors, (383), 350 states have internal predecessors, (383), 94 states have call successors, (94), 32 states have call predecessors, (94), 41 states have return successors, (163), 93 states have call predecessors, (163), 93 states have call successors, (163) [2021-12-28 03:15:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 640 transitions. [2021-12-28 03:15:21,480 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 640 transitions. Word has length 153 [2021-12-28 03:15:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 640 transitions. [2021-12-28 03:15:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 14 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (47), 10 states have call predecessors, (47), 13 states have call successors, (47) [2021-12-28 03:15:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 640 transitions. [2021-12-28 03:15:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-28 03:15:21,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:21,487 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] [2021-12-28 03:15:21,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:21,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:21,698 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:21,699 INFO L85 PathProgramCache]: Analyzing trace with hash 126231492, now seen corresponding path program 3 times [2021-12-28 03:15:21,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:21,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989142151] [2021-12-28 03:15:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:21,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms