./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 10:51:03,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 10:51:03,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 10:51:03,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 10:51:03,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 10:51:03,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 10:51:03,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 10:51:03,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 10:51:03,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 10:51:03,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 10:51:03,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 10:51:03,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 10:51:03,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 10:51:03,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 10:51:03,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 10:51:03,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 10:51:03,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 10:51:03,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 10:51:03,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 10:51:03,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 10:51:03,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 10:51:03,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 10:51:03,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 10:51:03,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 10:51:03,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 10:51:03,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 10:51:03,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 10:51:03,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 10:51:03,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 10:51:03,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 10:51:03,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 10:51:03,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 10:51:03,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 10:51:03,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 10:51:03,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 10:51:03,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 10:51:03,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 10:51:03,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 10:51:03,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 10:51:03,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 10:51:03,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 10:51:03,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 10:51:03,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 10:51:03,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 10:51:03,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 10:51:03,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 10:51:03,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 10:51:03,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 10:51:03,144 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 10:51:03,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 10:51:03,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 10:51:03,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 10:51:03,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 10:51:03,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 10:51:03,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 10:51:03,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 10:51:03,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 10:51:03,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 10:51:03,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 10:51:03,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 10:51:03,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 10:51:03,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2021-11-06 10:51:03,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 10:51:03,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 10:51:03,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 10:51:03,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 10:51:03,338 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 10:51:03,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-06 10:51:03,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f970da/4e9f24ee618f4c048acd0f5b760feebd/FLAG607c9a982 [2021-11-06 10:51:03,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 10:51:03,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-06 10:51:03,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f970da/4e9f24ee618f4c048acd0f5b760feebd/FLAG607c9a982 [2021-11-06 10:51:04,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868f970da/4e9f24ee618f4c048acd0f5b760feebd [2021-11-06 10:51:04,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 10:51:04,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 10:51:04,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 10:51:04,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 10:51:04,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 10:51:04,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:04" (1/1) ... [2021-11-06 10:51:04,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ad7c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:04, skipping insertion in model container [2021-11-06 10:51:04,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:04" (1/1) ... [2021-11-06 10:51:04,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 10:51:04,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 10:51:04,680 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-06 10:51:04,686 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-06 10:51:04,704 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 10:51:04,709 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 10:51:05,193 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,195 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,195 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,196 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,197 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,208 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,211 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,429 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 10:51:05,430 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 10:51:05,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 10:51:05,431 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 10:51:05,432 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 10:51:05,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 10:51:05,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 10:51:05,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 10:51:05,434 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 10:51:05,434 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 10:51:05,509 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 10:51:05,601 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,601 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 10:51:05,697 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 10:51:05,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-06 10:51:05,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-06 10:51:05,714 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 10:51:05,715 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 10:51:05,740 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,740 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,741 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,741 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,741 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,744 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,745 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,745 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,746 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,763 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 10:51:05,765 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 10:51:05,766 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 10:51:05,766 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 10:51:05,767 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 10:51:05,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 10:51:05,768 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 10:51:05,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 10:51:05,769 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 10:51:05,770 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 10:51:05,787 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 10:51:05,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,853 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:51:05,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 10:51:06,032 INFO L208 MainTranslator]: Completed translation [2021-11-06 10:51:06,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06 WrapperNode [2021-11-06 10:51:06,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 10:51:06,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 10:51:06,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 10:51:06,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 10:51:06,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 10:51:06,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 10:51:06,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 10:51:06,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 10:51:06,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 10:51:06,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 10:51:06,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 10:51:06,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 10:51:06,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (1/1) ... [2021-11-06 10:51:06,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 10:51:06,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:51:06,335 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) [2021-11-06 10:51:06,355 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 [2021-11-06 10:51:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 10:51:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 10:51:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 10:51:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 10:51:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 10:51:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 10:51:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 10:51:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 10:51:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 10:51:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 10:51:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 10:51:13,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 10:51:13,352 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-06 10:51:13,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:13 BoogieIcfgContainer [2021-11-06 10:51:13,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 10:51:13,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 10:51:13,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 10:51:13,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 10:51:13,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:04" (1/3) ... [2021-11-06 10:51:13,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435dd821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:13, skipping insertion in model container [2021-11-06 10:51:13,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:06" (2/3) ... [2021-11-06 10:51:13,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435dd821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:13, skipping insertion in model container [2021-11-06 10:51:13,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:13" (3/3) ... [2021-11-06 10:51:13,358 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2021-11-06 10:51:13,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 10:51:13,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-06 10:51:13,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 10:51:13,398 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 [2021-11-06 10:51:13,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-06 10:51:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-06 10:51:13,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:13,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:13,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash 960385600, now seen corresponding path program 1 times [2021-11-06 10:51:13,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:13,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567875732] [2021-11-06 10:51:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:13,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:13,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:13,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567875732] [2021-11-06 10:51:13,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567875732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:13,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:13,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 10:51:13,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795200107] [2021-11-06 10:51:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 10:51:13,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 10:51:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 10:51:13,934 INFO L87 Difference]: Start difference. First operand has 125 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:13,957 INFO L93 Difference]: Finished difference Result 246 states and 339 transitions. [2021-11-06 10:51:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 10:51:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-06 10:51:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:13,964 INFO L225 Difference]: With dead ends: 246 [2021-11-06 10:51:13,964 INFO L226 Difference]: Without dead ends: 118 [2021-11-06 10:51:13,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 10:51:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-06 10:51:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-06 10:51:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.336283185840708) internal successors, (151), 117 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2021-11-06 10:51:13,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 30 [2021-11-06 10:51:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:13,990 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2021-11-06 10:51:13,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2021-11-06 10:51:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-06 10:51:13,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:13,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 10:51:13,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash -649638665, now seen corresponding path program 1 times [2021-11-06 10:51:13,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:13,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641441246] [2021-11-06 10:51:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:13,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:14,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:14,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641441246] [2021-11-06 10:51:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641441246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:14,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:14,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 10:51:14,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057387191] [2021-11-06 10:51:14,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 10:51:14,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 10:51:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:51:14,268 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:14,421 INFO L93 Difference]: Finished difference Result 215 states and 275 transitions. [2021-11-06 10:51:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 10:51:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-06 10:51:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:14,424 INFO L225 Difference]: With dead ends: 215 [2021-11-06 10:51:14,424 INFO L226 Difference]: Without dead ends: 118 [2021-11-06 10:51:14,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:51:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-06 10:51:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-06 10:51:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 117 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2021-11-06 10:51:14,434 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 32 [2021-11-06 10:51:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:14,434 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2021-11-06 10:51:14,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2021-11-06 10:51:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-06 10:51:14,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:14,436 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:14,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 10:51:14,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1150788759, now seen corresponding path program 1 times [2021-11-06 10:51:14,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:14,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479155095] [2021-11-06 10:51:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:14,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:14,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:14,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479155095] [2021-11-06 10:51:14,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479155095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:14,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:14,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:51:14,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276812679] [2021-11-06 10:51:14,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:51:14,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:51:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:51:14,878 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:15,167 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2021-11-06 10:51:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 10:51:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-06 10:51:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:15,172 INFO L225 Difference]: With dead ends: 176 [2021-11-06 10:51:15,172 INFO L226 Difference]: Without dead ends: 118 [2021-11-06 10:51:15,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:51:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-06 10:51:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-06 10:51:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 117 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2021-11-06 10:51:15,178 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 36 [2021-11-06 10:51:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:15,178 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2021-11-06 10:51:15,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2021-11-06 10:51:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-06 10:51:15,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:15,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:15,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 10:51:15,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 410162962, now seen corresponding path program 1 times [2021-11-06 10:51:15,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:15,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005389958] [2021-11-06 10:51:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:15,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:15,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:15,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005389958] [2021-11-06 10:51:15,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005389958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:15,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:15,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 10:51:15,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831491477] [2021-11-06 10:51:15,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 10:51:15,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 10:51:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:51:15,631 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:16,385 INFO L93 Difference]: Finished difference Result 218 states and 263 transitions. [2021-11-06 10:51:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:51:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-06 10:51:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:16,386 INFO L225 Difference]: With dead ends: 218 [2021-11-06 10:51:16,386 INFO L226 Difference]: Without dead ends: 210 [2021-11-06 10:51:16,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:51:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-06 10:51:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 134. [2021-11-06 10:51:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 133 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2021-11-06 10:51:16,394 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 38 [2021-11-06 10:51:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:16,394 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2021-11-06 10:51:16,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2021-11-06 10:51:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 10:51:16,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:16,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 10:51:16,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash -235054390, now seen corresponding path program 1 times [2021-11-06 10:51:16,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:16,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381496460] [2021-11-06 10:51:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:16,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:16,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381496460] [2021-11-06 10:51:16,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381496460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:16,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:16,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:51:16,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400865657] [2021-11-06 10:51:16,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:51:16,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:51:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:51:16,985 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:29,642 INFO L93 Difference]: Finished difference Result 403 states and 486 transitions. [2021-11-06 10:51:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 10:51:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-06 10:51:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:29,645 INFO L225 Difference]: With dead ends: 403 [2021-11-06 10:51:29,645 INFO L226 Difference]: Without dead ends: 295 [2021-11-06 10:51:29,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-11-06 10:51:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-06 10:51:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-11-06 10:51:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.248868778280543) internal successors, (276), 225 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 276 transitions. [2021-11-06 10:51:29,660 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 276 transitions. Word has length 42 [2021-11-06 10:51:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 276 transitions. [2021-11-06 10:51:29,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 276 transitions. [2021-11-06 10:51:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 10:51:29,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:29,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:29,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 10:51:29,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 324843685, now seen corresponding path program 1 times [2021-11-06 10:51:29,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:29,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079184898] [2021-11-06 10:51:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:29,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:29,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:29,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079184898] [2021-11-06 10:51:29,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079184898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:29,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:29,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 10:51:29,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631226503] [2021-11-06 10:51:29,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 10:51:29,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 10:51:29,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:51:29,901 INFO L87 Difference]: Start difference. First operand 226 states and 276 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:30,029 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2021-11-06 10:51:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 10:51:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-06 10:51:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:30,031 INFO L225 Difference]: With dead ends: 302 [2021-11-06 10:51:30,031 INFO L226 Difference]: Without dead ends: 226 [2021-11-06 10:51:30,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:51:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-06 10:51:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-06 10:51:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.239819004524887) internal successors, (274), 225 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 274 transitions. [2021-11-06 10:51:30,038 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 274 transitions. Word has length 43 [2021-11-06 10:51:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:30,039 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 274 transitions. [2021-11-06 10:51:30,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 274 transitions. [2021-11-06 10:51:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-06 10:51:30,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:30,047 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 10:51:30,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 10:51:30,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:30,049 INFO L85 PathProgramCache]: Analyzing trace with hash 495838041, now seen corresponding path program 1 times [2021-11-06 10:51:30,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:30,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028614008] [2021-11-06 10:51:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:30,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:30,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:30,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028614008] [2021-11-06 10:51:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028614008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:30,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 10:51:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270836321] [2021-11-06 10:51:30,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 10:51:30,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 10:51:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 10:51:30,195 INFO L87 Difference]: Start difference. First operand 226 states and 274 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:30,226 INFO L93 Difference]: Finished difference Result 318 states and 387 transitions. [2021-11-06 10:51:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 10:51:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-06 10:51:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:30,228 INFO L225 Difference]: With dead ends: 318 [2021-11-06 10:51:30,228 INFO L226 Difference]: Without dead ends: 229 [2021-11-06 10:51:30,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 10:51:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-06 10:51:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-11-06 10:51:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2366071428571428) internal successors, (277), 228 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 277 transitions. [2021-11-06 10:51:30,234 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 277 transitions. Word has length 45 [2021-11-06 10:51:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:30,234 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 277 transitions. [2021-11-06 10:51:30,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 277 transitions. [2021-11-06 10:51:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-06 10:51:30,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:30,235 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:30,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 10:51:30,235 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2004884674, now seen corresponding path program 1 times [2021-11-06 10:51:30,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:30,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797614210] [2021-11-06 10:51:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:30,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:30,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:30,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797614210] [2021-11-06 10:51:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797614210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:30,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:30,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:51:30,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599855251] [2021-11-06 10:51:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:51:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:51:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:51:30,704 INFO L87 Difference]: Start difference. First operand 229 states and 277 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:31,527 INFO L93 Difference]: Finished difference Result 480 states and 571 transitions. [2021-11-06 10:51:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 10:51:31,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-06 10:51:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:31,529 INFO L225 Difference]: With dead ends: 480 [2021-11-06 10:51:31,529 INFO L226 Difference]: Without dead ends: 290 [2021-11-06 10:51:31,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:51:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-06 10:51:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2021-11-06 10:51:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2276785714285714) internal successors, (275), 228 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2021-11-06 10:51:31,537 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 46 [2021-11-06 10:51:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2021-11-06 10:51:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2021-11-06 10:51:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-06 10:51:31,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:31,538 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:31,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 10:51:31,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -954265451, now seen corresponding path program 1 times [2021-11-06 10:51:31,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:31,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017906033] [2021-11-06 10:51:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:31,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:51:32,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:32,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017906033] [2021-11-06 10:51:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017906033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:32,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:32,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:51:32,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806780550] [2021-11-06 10:51:32,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:51:32,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:51:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:51:32,062 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:37,277 INFO L93 Difference]: Finished difference Result 447 states and 537 transitions. [2021-11-06 10:51:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 10:51:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-06 10:51:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:37,279 INFO L225 Difference]: With dead ends: 447 [2021-11-06 10:51:37,279 INFO L226 Difference]: Without dead ends: 292 [2021-11-06 10:51:37,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-06 10:51:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-06 10:51:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 223. [2021-11-06 10:51:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.2155963302752293) internal successors, (265), 222 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 265 transitions. [2021-11-06 10:51:37,285 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 265 transitions. Word has length 47 [2021-11-06 10:51:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:37,285 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 265 transitions. [2021-11-06 10:51:37,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 265 transitions. [2021-11-06 10:51:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-06 10:51:37,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:37,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:37,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 10:51:37,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 93394749, now seen corresponding path program 1 times [2021-11-06 10:51:37,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:37,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26664532] [2021-11-06 10:51:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:37,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:37,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:37,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26664532] [2021-11-06 10:51:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26664532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:37,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:37,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 10:51:37,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115986228] [2021-11-06 10:51:37,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 10:51:37,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 10:51:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:51:37,628 INFO L87 Difference]: Start difference. First operand 223 states and 265 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:40,441 INFO L93 Difference]: Finished difference Result 438 states and 520 transitions. [2021-11-06 10:51:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 10:51:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-06 10:51:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:40,443 INFO L225 Difference]: With dead ends: 438 [2021-11-06 10:51:40,443 INFO L226 Difference]: Without dead ends: 255 [2021-11-06 10:51:40,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:51:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-06 10:51:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-11-06 10:51:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.1743119266055047) internal successors, (256), 222 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 256 transitions. [2021-11-06 10:51:40,449 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 256 transitions. Word has length 48 [2021-11-06 10:51:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:40,449 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 256 transitions. [2021-11-06 10:51:40,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 256 transitions. [2021-11-06 10:51:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-06 10:51:40,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:40,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:40,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 10:51:40,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2144378747, now seen corresponding path program 1 times [2021-11-06 10:51:40,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:40,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727377991] [2021-11-06 10:51:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:40,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:40,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:40,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727377991] [2021-11-06 10:51:40,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727377991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:40,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:40,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:51:40,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084393801] [2021-11-06 10:51:40,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:51:40,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:51:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:51:41,000 INFO L87 Difference]: Start difference. First operand 223 states and 256 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:51,169 INFO L93 Difference]: Finished difference Result 577 states and 661 transitions. [2021-11-06 10:51:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 10:51:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-06 10:51:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:51,172 INFO L225 Difference]: With dead ends: 577 [2021-11-06 10:51:51,172 INFO L226 Difference]: Without dead ends: 512 [2021-11-06 10:51:51,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-11-06 10:51:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-06 10:51:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 200. [2021-11-06 10:51:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 199 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2021-11-06 10:51:51,179 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 48 [2021-11-06 10:51:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:51,179 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2021-11-06 10:51:51,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2021-11-06 10:51:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-06 10:51:51,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:51,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:51,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 10:51:51,180 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash 870337434, now seen corresponding path program 1 times [2021-11-06 10:51:51,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:51,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136986293] [2021-11-06 10:51:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:51,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:51,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:51,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136986293] [2021-11-06 10:51:51,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136986293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:51,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:51,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 10:51:51,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425426381] [2021-11-06 10:51:51,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 10:51:51,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 10:51:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:51:51,474 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:51:54,071 INFO L93 Difference]: Finished difference Result 376 states and 431 transitions. [2021-11-06 10:51:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 10:51:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-06 10:51:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:51:54,073 INFO L225 Difference]: With dead ends: 376 [2021-11-06 10:51:54,073 INFO L226 Difference]: Without dead ends: 200 [2021-11-06 10:51:54,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:51:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-06 10:51:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-11-06 10:51:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1333333333333333) internal successors, (221), 199 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-11-06 10:51:54,079 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 49 [2021-11-06 10:51:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:51:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-11-06 10:51:54,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:51:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-11-06 10:51:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-06 10:51:54,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:51:54,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:51:54,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 10:51:54,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:51:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:51:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash 190279064, now seen corresponding path program 1 times [2021-11-06 10:51:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:51:54,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925366852] [2021-11-06 10:51:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:51:54,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:51:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:51:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:51:54,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:51:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925366852] [2021-11-06 10:51:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925366852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:51:54,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:51:54,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 10:51:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443708300] [2021-11-06 10:51:54,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 10:51:54,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:51:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 10:51:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:51:54,681 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:05,097 INFO L93 Difference]: Finished difference Result 314 states and 338 transitions. [2021-11-06 10:52:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 10:52:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-06 10:52:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:05,098 INFO L225 Difference]: With dead ends: 314 [2021-11-06 10:52:05,098 INFO L226 Difference]: Without dead ends: 268 [2021-11-06 10:52:05,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-11-06 10:52:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-06 10:52:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 220. [2021-11-06 10:52:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1209302325581396) internal successors, (241), 219 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2021-11-06 10:52:05,105 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 49 [2021-11-06 10:52:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:05,105 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2021-11-06 10:52:05,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2021-11-06 10:52:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 10:52:05,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:05,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:05,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 10:52:05,106 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1316272933, now seen corresponding path program 1 times [2021-11-06 10:52:05,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:05,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831571874] [2021-11-06 10:52:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:05,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:05,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:05,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831571874] [2021-11-06 10:52:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831571874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:05,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:52:05,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232001533] [2021-11-06 10:52:05,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:52:05,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:52:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:52:05,359 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:05,572 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2021-11-06 10:52:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 10:52:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-06 10:52:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:05,573 INFO L225 Difference]: With dead ends: 258 [2021-11-06 10:52:05,574 INFO L226 Difference]: Without dead ends: 220 [2021-11-06 10:52:05,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:52:05,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-06 10:52:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-06 10:52:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1116279069767443) internal successors, (239), 219 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 239 transitions. [2021-11-06 10:52:05,580 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 239 transitions. Word has length 51 [2021-11-06 10:52:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 239 transitions. [2021-11-06 10:52:05,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 239 transitions. [2021-11-06 10:52:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-06 10:52:05,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:05,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 10:52:05,581 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1409745750, now seen corresponding path program 1 times [2021-11-06 10:52:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:05,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853753872] [2021-11-06 10:52:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:05,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:06,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:06,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853753872] [2021-11-06 10:52:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853753872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:06,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:06,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:52:06,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667928052] [2021-11-06 10:52:06,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:52:06,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:52:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:52:06,062 INFO L87 Difference]: Start difference. First operand 220 states and 239 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:16,085 INFO L93 Difference]: Finished difference Result 589 states and 639 transitions. [2021-11-06 10:52:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 10:52:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-06 10:52:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:16,087 INFO L225 Difference]: With dead ends: 589 [2021-11-06 10:52:16,087 INFO L226 Difference]: Without dead ends: 504 [2021-11-06 10:52:16,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-06 10:52:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-06 10:52:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 222. [2021-11-06 10:52:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.1105990783410138) internal successors, (241), 221 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 241 transitions. [2021-11-06 10:52:16,095 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 241 transitions. Word has length 54 [2021-11-06 10:52:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:16,096 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 241 transitions. [2021-11-06 10:52:16,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 241 transitions. [2021-11-06 10:52:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 10:52:16,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:16,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:16,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 10:52:16,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2092937159, now seen corresponding path program 1 times [2021-11-06 10:52:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:16,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835661065] [2021-11-06 10:52:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:16,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:16,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:16,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835661065] [2021-11-06 10:52:16,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835661065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:16,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:16,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:52:16,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660906205] [2021-11-06 10:52:16,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:52:16,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:52:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:52:16,605 INFO L87 Difference]: Start difference. First operand 222 states and 241 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:29,173 INFO L93 Difference]: Finished difference Result 543 states and 586 transitions. [2021-11-06 10:52:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 10:52:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-06 10:52:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:29,175 INFO L225 Difference]: With dead ends: 543 [2021-11-06 10:52:29,175 INFO L226 Difference]: Without dead ends: 497 [2021-11-06 10:52:29,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-11-06 10:52:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-06 10:52:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 192. [2021-11-06 10:52:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.1122994652406417) internal successors, (208), 191 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 208 transitions. [2021-11-06 10:52:29,182 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 208 transitions. Word has length 55 [2021-11-06 10:52:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:29,182 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 208 transitions. [2021-11-06 10:52:29,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 208 transitions. [2021-11-06 10:52:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 10:52:29,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:29,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:29,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 10:52:29,183 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 485245166, now seen corresponding path program 1 times [2021-11-06 10:52:29,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:29,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908844667] [2021-11-06 10:52:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:29,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:31,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:31,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908844667] [2021-11-06 10:52:31,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908844667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:31,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:31,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:52:31,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633774828] [2021-11-06 10:52:31,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:52:31,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:52:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:52:31,294 INFO L87 Difference]: Start difference. First operand 192 states and 208 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:32,236 INFO L93 Difference]: Finished difference Result 432 states and 464 transitions. [2021-11-06 10:52:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:52:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-06 10:52:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:32,237 INFO L225 Difference]: With dead ends: 432 [2021-11-06 10:52:32,237 INFO L226 Difference]: Without dead ends: 263 [2021-11-06 10:52:32,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-06 10:52:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-06 10:52:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 196. [2021-11-06 10:52:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 195 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2021-11-06 10:52:32,243 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 56 [2021-11-06 10:52:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:32,243 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2021-11-06 10:52:32,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2021-11-06 10:52:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 10:52:32,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:32,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:32,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 10:52:32,244 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash 682041880, now seen corresponding path program 1 times [2021-11-06 10:52:32,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:32,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231058743] [2021-11-06 10:52:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:32,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:32,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:32,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231058743] [2021-11-06 10:52:32,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231058743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:32,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:32,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:52:32,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035749414] [2021-11-06 10:52:32,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:52:32,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:52:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:52:32,771 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:43,121 INFO L93 Difference]: Finished difference Result 276 states and 290 transitions. [2021-11-06 10:52:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 10:52:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-06 10:52:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:43,122 INFO L225 Difference]: With dead ends: 276 [2021-11-06 10:52:43,122 INFO L226 Difference]: Without dead ends: 250 [2021-11-06 10:52:43,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-11-06 10:52:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-06 10:52:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-11-06 10:52:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.095890410958904) internal successors, (240), 223 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2021-11-06 10:52:43,131 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 57 [2021-11-06 10:52:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:43,131 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2021-11-06 10:52:43,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2021-11-06 10:52:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 10:52:43,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:43,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 10:52:43,132 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1050364765, now seen corresponding path program 1 times [2021-11-06 10:52:43,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:43,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494796438] [2021-11-06 10:52:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:45,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:45,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494796438] [2021-11-06 10:52:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494796438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:45,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:45,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-06 10:52:45,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351727074] [2021-11-06 10:52:45,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 10:52:45,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 10:52:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-06 10:52:45,674 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:52:54,283 INFO L93 Difference]: Finished difference Result 451 states and 478 transitions. [2021-11-06 10:52:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 10:52:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-06 10:52:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:52:54,284 INFO L225 Difference]: With dead ends: 451 [2021-11-06 10:52:54,284 INFO L226 Difference]: Without dead ends: 297 [2021-11-06 10:52:54,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-11-06 10:52:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-06 10:52:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-11-06 10:52:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.091324200913242) internal successors, (239), 223 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2021-11-06 10:52:54,293 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 59 [2021-11-06 10:52:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:52:54,293 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2021-11-06 10:52:54,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:52:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2021-11-06 10:52:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 10:52:54,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:52:54,294 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:52:54,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 10:52:54,294 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:52:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:52:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1944530334, now seen corresponding path program 1 times [2021-11-06 10:52:54,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:52:54,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859108348] [2021-11-06 10:52:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:52:54,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:52:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:52:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:52:57,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:52:57,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859108348] [2021-11-06 10:52:57,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859108348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:52:57,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:52:57,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 10:52:57,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78242159] [2021-11-06 10:52:57,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 10:52:57,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:52:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 10:52:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:52:57,900 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:53:08,751 INFO L93 Difference]: Finished difference Result 386 states and 414 transitions. [2021-11-06 10:53:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 10:53:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-06 10:53:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:53:08,752 INFO L225 Difference]: With dead ends: 386 [2021-11-06 10:53:08,753 INFO L226 Difference]: Without dead ends: 314 [2021-11-06 10:53:08,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-11-06 10:53:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-06 10:53:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 233. [2021-11-06 10:53:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0964912280701755) internal successors, (250), 232 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 250 transitions. [2021-11-06 10:53:08,761 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 250 transitions. Word has length 62 [2021-11-06 10:53:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:53:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 250 transitions. [2021-11-06 10:53:08,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 250 transitions. [2021-11-06 10:53:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 10:53:08,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:53:08,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:53:08,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 10:53:08,763 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:53:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:53:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash 690621047, now seen corresponding path program 1 times [2021-11-06 10:53:08,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:53:08,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790239992] [2021-11-06 10:53:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:53:08,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:53:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:53:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:53:09,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:53:09,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790239992] [2021-11-06 10:53:09,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790239992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:53:09,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:53:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 10:53:09,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789466628] [2021-11-06 10:53:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 10:53:09,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:53:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 10:53:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:53:09,357 INFO L87 Difference]: Start difference. First operand 233 states and 250 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:53:16,803 INFO L93 Difference]: Finished difference Result 348 states and 370 transitions. [2021-11-06 10:53:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 10:53:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 10:53:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:53:16,805 INFO L225 Difference]: With dead ends: 348 [2021-11-06 10:53:16,805 INFO L226 Difference]: Without dead ends: 340 [2021-11-06 10:53:16,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-11-06 10:53:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-06 10:53:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 238. [2021-11-06 10:53:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.094420600858369) internal successors, (255), 237 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 255 transitions. [2021-11-06 10:53:16,815 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 255 transitions. Word has length 64 [2021-11-06 10:53:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:53:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 255 transitions. [2021-11-06 10:53:16,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 255 transitions. [2021-11-06 10:53:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 10:53:16,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:53:16,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:53:16,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-06 10:53:16,816 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:53:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:53:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1997517733, now seen corresponding path program 1 times [2021-11-06 10:53:16,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:53:16,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596507598] [2021-11-06 10:53:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:53:16,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:53:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:53:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:53:17,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:53:17,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596507598] [2021-11-06 10:53:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596507598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:53:17,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:53:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 10:53:17,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778242552] [2021-11-06 10:53:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 10:53:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:53:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 10:53:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:53:17,418 INFO L87 Difference]: Start difference. First operand 238 states and 255 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:53:24,754 INFO L93 Difference]: Finished difference Result 256 states and 272 transitions. [2021-11-06 10:53:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 10:53:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 10:53:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:53:24,755 INFO L225 Difference]: With dead ends: 256 [2021-11-06 10:53:24,755 INFO L226 Difference]: Without dead ends: 197 [2021-11-06 10:53:24,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:53:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-06 10:53:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-06 10:53:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.1041666666666667) internal successors, (212), 196 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2021-11-06 10:53:24,763 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 65 [2021-11-06 10:53:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:53:24,764 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2021-11-06 10:53:24,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:53:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2021-11-06 10:53:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 10:53:24,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:53:24,765 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:53:24,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-06 10:53:24,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:53:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:53:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1188769797, now seen corresponding path program 1 times [2021-11-06 10:53:24,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:53:24,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786755419] [2021-11-06 10:53:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:53:24,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:53:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:53:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:53:28,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:53:28,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786755419] [2021-11-06 10:53:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786755419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:53:28,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931723263] [2021-11-06 10:53:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:53:28,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:53:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:53:28,537 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) [2021-11-06 10:53:28,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 10:53:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:53:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-06 10:53:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:53:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-06 10:53:29,588 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-06 10:53:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-06 10:53:29,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-06 10:53:30,577 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-06 10:53:30,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-11-06 10:53:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-11-06 10:53:30,838 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-06 10:53:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2021-11-06 10:53:31,467 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-06 10:53:31,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2021-11-06 10:53:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:53:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:53:31,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-06 10:53:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:53:31,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:53:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2021-11-06 10:53:32,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-06 10:53:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-11-06 10:53:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:53:32,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931723263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:53:32,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 10:53:32,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-11-06 10:53:32,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683657163] [2021-11-06 10:53:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 10:53:32,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:53:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 10:53:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-06 10:53:32,481 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:54:12,895 INFO L93 Difference]: Finished difference Result 370 states and 399 transitions. [2021-11-06 10:54:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-06 10:54:12,895 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 10:54:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:54:12,896 INFO L225 Difference]: With dead ends: 370 [2021-11-06 10:54:12,897 INFO L226 Difference]: Without dead ends: 295 [2021-11-06 10:54:12,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1039, Invalid=3791, Unknown=0, NotChecked=0, Total=4830 [2021-11-06 10:54:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-06 10:54:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 174. [2021-11-06 10:54:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 171 states have (on average 1.0818713450292399) internal successors, (185), 173 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 185 transitions. [2021-11-06 10:54:12,907 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 185 transitions. Word has length 65 [2021-11-06 10:54:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:54:12,907 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 185 transitions. [2021-11-06 10:54:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 185 transitions. [2021-11-06 10:54:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 10:54:12,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:54:12,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:54:12,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 10:54:13,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 10:54:13,128 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:54:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:54:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1261449879, now seen corresponding path program 1 times [2021-11-06 10:54:13,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:54:13,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340373655] [2021-11-06 10:54:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:54:13,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:54:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:54:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:54:13,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:54:13,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340373655] [2021-11-06 10:54:13,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340373655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:54:13,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:54:13,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:54:13,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225806074] [2021-11-06 10:54:13,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:54:13,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:54:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:54:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:54:13,636 INFO L87 Difference]: Start difference. First operand 174 states and 185 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:54:21,407 INFO L93 Difference]: Finished difference Result 253 states and 265 transitions. [2021-11-06 10:54:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 10:54:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-06 10:54:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:54:21,408 INFO L225 Difference]: With dead ends: 253 [2021-11-06 10:54:21,408 INFO L226 Difference]: Without dead ends: 222 [2021-11-06 10:54:21,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-06 10:54:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-06 10:54:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 163. [2021-11-06 10:54:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 160 states have (on average 1.06875) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2021-11-06 10:54:21,416 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 69 [2021-11-06 10:54:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:54:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-11-06 10:54:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2021-11-06 10:54:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 10:54:21,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:54:21,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:54:21,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-06 10:54:21,417 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:54:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:54:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -23690172, now seen corresponding path program 1 times [2021-11-06 10:54:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:54:21,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450067984] [2021-11-06 10:54:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:54:21,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:54:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:54:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:54:21,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:54:21,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450067984] [2021-11-06 10:54:21,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450067984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:54:21,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:54:21,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:54:21,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104053902] [2021-11-06 10:54:21,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:54:21,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:54:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:54:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:54:21,969 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:54:29,487 INFO L93 Difference]: Finished difference Result 299 states and 317 transitions. [2021-11-06 10:54:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:54:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-06 10:54:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:54:29,488 INFO L225 Difference]: With dead ends: 299 [2021-11-06 10:54:29,488 INFO L226 Difference]: Without dead ends: 234 [2021-11-06 10:54:29,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:54:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-06 10:54:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 169. [2021-11-06 10:54:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.072289156626506) internal successors, (178), 168 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2021-11-06 10:54:29,497 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 69 [2021-11-06 10:54:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:54:29,497 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2021-11-06 10:54:29,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2021-11-06 10:54:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 10:54:29,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:54:29,498 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 10:54:29,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-06 10:54:29,498 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:54:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:54:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1058361341, now seen corresponding path program 1 times [2021-11-06 10:54:29,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:54:29,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745150011] [2021-11-06 10:54:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:54:29,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:54:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:54:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:54:30,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:54:30,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745150011] [2021-11-06 10:54:30,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745150011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:54:30,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:54:30,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 10:54:30,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157615746] [2021-11-06 10:54:30,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 10:54:30,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:54:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 10:54:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:54:30,139 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:54:34,868 INFO L93 Difference]: Finished difference Result 249 states and 263 transitions. [2021-11-06 10:54:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 10:54:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-06 10:54:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:54:34,869 INFO L225 Difference]: With dead ends: 249 [2021-11-06 10:54:34,869 INFO L226 Difference]: Without dead ends: 191 [2021-11-06 10:54:34,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:54:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-06 10:54:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-11-06 10:54:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 182 states have (on average 1.0714285714285714) internal successors, (195), 184 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2021-11-06 10:54:34,878 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 72 [2021-11-06 10:54:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:54:34,878 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2021-11-06 10:54:34,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:54:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2021-11-06 10:54:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 10:54:34,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:54:34,879 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 10:54:34,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-06 10:54:34,879 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:54:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:54:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1034320377, now seen corresponding path program 1 times [2021-11-06 10:54:34,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:54:34,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218089022] [2021-11-06 10:54:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:54:34,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:54:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:54:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:54:35,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:54:35,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218089022] [2021-11-06 10:54:35,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218089022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:54:35,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092138943] [2021-11-06 10:54:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:54:35,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:54:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:54:35,829 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) [2021-11-06 10:54:35,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 10:54:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:54:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-06 10:54:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:54:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 10:54:37,465 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-06 10:54:37,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2021-11-06 10:54:37,726 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-06 10:54:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-11-06 10:54:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:54:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:54:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:54:38,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-06 10:54:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-11-06 10:54:38,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:54:38,908 INFO L354 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2021-11-06 10:54:38,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2021-11-06 10:54:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:54:39,035 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-06 10:54:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-11-06 10:54:40,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-06 10:54:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-06 10:54:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:54:41,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092138943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:54:41,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 10:54:41,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2021-11-06 10:54:41,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015080376] [2021-11-06 10:54:41,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-06 10:54:41,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:54:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-06 10:54:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-11-06 10:54:41,071 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 31 states, 31 states have (on average 4.451612903225806) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:55:19,379 INFO L93 Difference]: Finished difference Result 354 states and 375 transitions. [2021-11-06 10:55:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-06 10:55:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.451612903225806) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-06 10:55:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:55:19,380 INFO L225 Difference]: With dead ends: 354 [2021-11-06 10:55:19,380 INFO L226 Difference]: Without dead ends: 282 [2021-11-06 10:55:19,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=754, Invalid=3406, Unknown=0, NotChecked=0, Total=4160 [2021-11-06 10:55:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-06 10:55:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 179. [2021-11-06 10:55:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 176 states have (on average 1.0568181818181819) internal successors, (186), 178 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2021-11-06 10:55:19,394 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 74 [2021-11-06 10:55:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:55:19,395 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2021-11-06 10:55:19,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.451612903225806) internal successors, (138), 31 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2021-11-06 10:55:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 10:55:19,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:55:19,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:55:19,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 10:55:19,596 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,SelfDestructingSolverStorable26 [2021-11-06 10:55:19,596 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:55:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:55:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash 144726291, now seen corresponding path program 1 times [2021-11-06 10:55:19,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:55:19,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258079946] [2021-11-06 10:55:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:55:19,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:55:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:55:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:55:23,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:55:23,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258079946] [2021-11-06 10:55:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258079946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:55:23,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:55:23,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-06 10:55:23,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426231603] [2021-11-06 10:55:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 10:55:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:55:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 10:55:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-06 10:55:23,482 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:55:39,764 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2021-11-06 10:55:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-06 10:55:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-06 10:55:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:55:39,765 INFO L225 Difference]: With dead ends: 224 [2021-11-06 10:55:39,766 INFO L226 Difference]: Without dead ends: 176 [2021-11-06 10:55:39,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-11-06 10:55:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-06 10:55:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-06 10:55:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 171 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2021-11-06 10:55:39,776 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 75 [2021-11-06 10:55:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:55:39,777 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2021-11-06 10:55:39,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2021-11-06 10:55:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 10:55:39,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:55:39,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:55:39,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-06 10:55:39,778 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:55:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:55:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -713304796, now seen corresponding path program 1 times [2021-11-06 10:55:39,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:55:39,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413602872] [2021-11-06 10:55:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:55:39,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:55:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:55:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:55:40,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:55:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413602872] [2021-11-06 10:55:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413602872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:55:40,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:55:40,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:55:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757185991] [2021-11-06 10:55:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:55:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:55:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:55:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:55:40,393 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:55:47,566 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2021-11-06 10:55:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:55:47,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 10:55:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:55:47,567 INFO L225 Difference]: With dead ends: 212 [2021-11-06 10:55:47,567 INFO L226 Difference]: Without dead ends: 166 [2021-11-06 10:55:47,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:55:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-06 10:55:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2021-11-06 10:55:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 135 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-11-06 10:55:47,574 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 77 [2021-11-06 10:55:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:55:47,574 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-11-06 10:55:47,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-11-06 10:55:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 10:55:47,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:55:47,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:55:47,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-06 10:55:47,575 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:55:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:55:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1823892115, now seen corresponding path program 1 times [2021-11-06 10:55:47,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:55:47,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510265733] [2021-11-06 10:55:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:55:47,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:55:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:55:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:55:48,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:55:48,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510265733] [2021-11-06 10:55:48,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510265733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:55:48,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:55:48,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:55:48,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548504335] [2021-11-06 10:55:48,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:55:48,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:55:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:55:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:55:48,289 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:55:53,377 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2021-11-06 10:55:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 10:55:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 10:55:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:55:53,378 INFO L225 Difference]: With dead ends: 211 [2021-11-06 10:55:53,378 INFO L226 Difference]: Without dead ends: 166 [2021-11-06 10:55:53,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-06 10:55:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-06 10:55:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-11-06 10:55:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-11-06 10:55:53,387 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 83 [2021-11-06 10:55:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:55:53,387 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-11-06 10:55:53,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:55:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-11-06 10:55:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 10:55:53,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:55:53,388 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:55:53,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-06 10:55:53,388 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:55:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:55:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash -444221812, now seen corresponding path program 1 times [2021-11-06 10:55:53,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:55:53,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480829587] [2021-11-06 10:55:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:55:53,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:55:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:55:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:55:57,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:55:57,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480829587] [2021-11-06 10:55:57,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480829587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:55:57,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076333907] [2021-11-06 10:55:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:55:57,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:55:57,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:55:57,107 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) [2021-11-06 10:55:57,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 10:55:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:55:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 3043 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-06 10:55:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:55:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-06 10:55:58,287 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-06 10:55:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-06 10:55:58,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-06 10:55:59,238 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-06 10:55:59,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-06 10:55:59,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-06 10:55:59,508 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-06 10:55:59,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2021-11-06 10:56:00,528 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-06 10:56:00,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 50 [2021-11-06 10:56:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:56:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:56:00,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-06 10:56:02,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_aws_byte_cursor_is_valid_~cursor.base] [2021-11-06 10:56:02,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 10:56:02,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-06 10:56:02,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073245080] [2021-11-06 10:56:02,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-06 10:56:02,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:56:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-06 10:56:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-06 10:56:02,081 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:56:23,889 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-11-06 10:56:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-06 10:56:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-06 10:56:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:56:23,890 INFO L225 Difference]: With dead ends: 188 [2021-11-06 10:56:23,890 INFO L226 Difference]: Without dead ends: 161 [2021-11-06 10:56:23,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=488, Invalid=2374, Unknown=0, NotChecked=0, Total=2862 [2021-11-06 10:56:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-06 10:56:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-06 10:56:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 147 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2021-11-06 10:56:23,898 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 86 [2021-11-06 10:56:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:56:23,898 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2021-11-06 10:56:23,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2021-11-06 10:56:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 10:56:23,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:56:23,899 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:56:23,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 10:56:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:56:24,100 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:56:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:56:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 891065369, now seen corresponding path program 1 times [2021-11-06 10:56:24,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:56:24,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085380332] [2021-11-06 10:56:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:56:24,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:56:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:56:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 10:56:25,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:56:25,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085380332] [2021-11-06 10:56:25,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085380332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:56:25,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:56:25,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:56:25,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583403824] [2021-11-06 10:56:25,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:56:25,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:56:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:56:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:56:25,058 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:56:32,252 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2021-11-06 10:56:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:56:32,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 10:56:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:56:32,253 INFO L225 Difference]: With dead ends: 172 [2021-11-06 10:56:32,253 INFO L226 Difference]: Without dead ends: 148 [2021-11-06 10:56:32,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-06 10:56:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-06 10:56:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-06 10:56:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-11-06 10:56:32,261 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 94 [2021-11-06 10:56:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:56:32,261 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-11-06 10:56:32,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-11-06 10:56:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 10:56:32,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:56:32,262 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:56:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-06 10:56:32,262 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:56:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:56:32,262 INFO L85 PathProgramCache]: Analyzing trace with hash -864157206, now seen corresponding path program 1 times [2021-11-06 10:56:32,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:56:32,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527465705] [2021-11-06 10:56:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:56:32,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:56:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:56:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 10:56:33,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:56:33,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527465705] [2021-11-06 10:56:33,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527465705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:56:33,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:56:33,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:56:33,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548999141] [2021-11-06 10:56:33,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:56:33,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:56:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:56:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:56:33,216 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:56:40,510 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2021-11-06 10:56:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 10:56:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-06 10:56:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:56:40,511 INFO L225 Difference]: With dead ends: 158 [2021-11-06 10:56:40,511 INFO L226 Difference]: Without dead ends: 148 [2021-11-06 10:56:40,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-06 10:56:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-06 10:56:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-06 10:56:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2021-11-06 10:56:40,519 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 100 [2021-11-06 10:56:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:56:40,519 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2021-11-06 10:56:40,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:56:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2021-11-06 10:56:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 10:56:40,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:56:40,520 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:56:40,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-06 10:56:40,521 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 10:56:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:56:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -435248645, now seen corresponding path program 1 times [2021-11-06 10:56:40,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:56:40,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961896587] [2021-11-06 10:56:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:56:40,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:56:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:56:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:56:56,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:56:56,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961896587] [2021-11-06 10:56:56,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961896587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:56:56,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54551363] [2021-11-06 10:56:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:56:56,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:56:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:56:56,600 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) [2021-11-06 10:56:56,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 11:02:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:02:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 3138 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-06 11:02:24,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:02:24,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-06 11:02:25,684 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-06 11:02:25,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-06 11:02:26,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-06 11:02:26,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 11:02:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:26,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-06 11:02:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:27,630 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-06 11:02:27,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-11-06 11:02:28,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 27 [2021-11-06 11:02:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-06 11:02:28,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-11-06 11:02:29,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 11:02:29,179 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-06 11:02:29,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-06 11:02:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 11:02:29,236 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-06 11:02:29,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 117 [2021-11-06 11:02:29,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,361 INFO L354 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2021-11-06 11:02:29,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 174 [2021-11-06 11:02:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 85 [2021-11-06 11:02:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:30,032 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-11-06 11:02:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-11-06 11:02:32,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:33,036 INFO L354 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2021-11-06 11:02:33,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 56 [2021-11-06 11:02:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 113 [2021-11-06 11:02:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 103 [2021-11-06 11:02:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:34,109 INFO L354 Elim1Store]: treesize reduction 193, result has 6.3 percent of original size [2021-11-06 11:02:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 109 treesize of output 97 [2021-11-06 11:02:34,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-06 11:02:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:02:34,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-06 11:02:40,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_aws_byte_cursor_is_valid_~cursor.base] [2021-11-06 11:02:40,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:02:40,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-06 11:02:40,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741442431] [2021-11-06 11:02:40,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-06 11:02:40,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:02:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-06 11:02:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2466, Unknown=0, NotChecked=0, Total=2652 [2021-11-06 11:02:40,264 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:03:31,611 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2021-11-06 11:03:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-06 11:03:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 11:03:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:03:31,613 INFO L225 Difference]: With dead ends: 246 [2021-11-06 11:03:31,613 INFO L226 Difference]: Without dead ends: 191 [2021-11-06 11:03:31,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=646, Invalid=4610, Unknown=0, NotChecked=0, Total=5256 [2021-11-06 11:03:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-06 11:03:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2021-11-06 11:03:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2021-11-06 11:03:31,634 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 106 [2021-11-06 11:03:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:03:31,634 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2021-11-06 11:03:31,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2021-11-06 11:03:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-06 11:03:31,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:03:31,635 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:03:31,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 11:03:31,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:03:31,839 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 11:03:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:03:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash -193835785, now seen corresponding path program 1 times [2021-11-06 11:03:31,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:03:31,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490637121] [2021-11-06 11:03:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:03:31,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:03:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:03:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:03:32,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:03:32,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490637121] [2021-11-06 11:03:32,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490637121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:03:32,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:03:32,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 11:03:32,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693710751] [2021-11-06 11:03:32,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:03:32,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:03:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:03:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:03:32,934 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:03:40,276 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-11-06 11:03:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 11:03:40,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-06 11:03:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:03:40,277 INFO L225 Difference]: With dead ends: 204 [2021-11-06 11:03:40,277 INFO L226 Difference]: Without dead ends: 166 [2021-11-06 11:03:40,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:03:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-06 11:03:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2021-11-06 11:03:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-11-06 11:03:40,286 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 108 [2021-11-06 11:03:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:03:40,287 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-11-06 11:03:40,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:03:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-11-06 11:03:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 11:03:40,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:03:40,287 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:03:40,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-06 11:03:40,288 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 11:03:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:03:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1218374803, now seen corresponding path program 1 times [2021-11-06 11:03:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:03:40,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331861476] [2021-11-06 11:03:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:03:40,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:03:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:04:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:04:26,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:04:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331861476] [2021-11-06 11:04:26,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331861476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:04:26,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:04:26,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-06 11:04:26,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315652867] [2021-11-06 11:04:26,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-06 11:04:26,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:04:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-06 11:04:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-06 11:04:26,752 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:04:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:04:45,327 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-11-06 11:04:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 11:04:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-06 11:04:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:04:45,328 INFO L225 Difference]: With dead ends: 194 [2021-11-06 11:04:45,328 INFO L226 Difference]: Without dead ends: 134 [2021-11-06 11:04:45,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2021-11-06 11:04:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-06 11:04:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-06 11:04:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:04:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-11-06 11:04:45,338 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 109 [2021-11-06 11:04:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:04:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-11-06 11:04:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:04:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-11-06 11:04:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-06 11:04:45,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:04:45,340 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:04:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-06 11:04:45,340 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 11:04:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:04:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash 330074470, now seen corresponding path program 2 times [2021-11-06 11:04:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:04:45,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290561358] [2021-11-06 11:04:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:04:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:04:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15