./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_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 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:55:55,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:55:55,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:55:55,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:55:55,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:55:55,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:55:55,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:55:55,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:55:55,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:55:55,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:55:55,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:55:55,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:55:55,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:55:55,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:55:55,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:55:55,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:55:55,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:55:55,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:55:55,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:55:55,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:55:55,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:55:55,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:55:55,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:55:55,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:55:55,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:55:55,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:55:55,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:55:55,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:55:55,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:55:55,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:55:55,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:55:55,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:55:55,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:55:55,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:55:55,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:55:55,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:55:55,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:55:55,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:55:55,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:55:55,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:55:55,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:55:55,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:55:55,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:55:55,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:55:55,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:55:55,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:55:55,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:55:55,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:55:55,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:55:55,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:55:55,363 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:55:55,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:55:55,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:55:55,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:55:55,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:55:55,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:55:55,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:55:55,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:55:55,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:55:55,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:55:55,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:55:55,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 [2021-12-22 13:55:55,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:55:55,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:55:55,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:55:55,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:55:55,590 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:55:55,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-22 13:55:55,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f5d226b/dc57010077b24c15a8675e53e8aad5f1/FLAGdb4873fd6 [2021-12-22 13:55:56,196 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:55:56,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-22 13:55:56,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f5d226b/dc57010077b24c15a8675e53e8aad5f1/FLAGdb4873fd6 [2021-12-22 13:55:56,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93f5d226b/dc57010077b24c15a8675e53e8aad5f1 [2021-12-22 13:55:56,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:55:56,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:55:56,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:55:56,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:55:56,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:55:56,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:55:56" (1/1) ... [2021-12-22 13:55:56,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b554bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:56, skipping insertion in model container [2021-12-22 13:55:56,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:55:56" (1/1) ... [2021-12-22 13:55:56,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:55:56,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:55:57,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-22 13:55:57,022 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-22 13:55:57,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,508 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,508 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,509 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,711 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:55:57,712 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:55:57,713 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:55:57,715 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:55:57,716 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:55:57,717 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:55:57,717 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:55:57,717 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:55:57,718 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:55:57,718 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:55:57,803 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:55:57,864 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,865 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:57,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:55:57,964 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:55:57,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-22 13:55:57,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-22 13:55:58,043 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,044 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,045 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,054 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,055 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,087 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:55:58,088 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:55:58,089 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:55:58,089 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:55:58,091 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:55:58,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:55:58,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:55:58,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:55:58,093 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:55:58,096 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:55:58,114 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:55:58,160 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,160 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:55:58,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:55:58,351 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:55:58,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58 WrapperNode [2021-12-22 13:55:58,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:55:58,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:55:58,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:55:58,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:55:58,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,507 INFO L137 Inliner]: procedures = 691, calls = 2624, calls flagged for inlining = 63, calls inlined = 11, statements flattened = 937 [2021-12-22 13:55:58,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:55:58,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:55:58,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:55:58,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:55:58,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:55:58,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:55:58,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:55:58,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:55:58,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (1/1) ... [2021-12-22 13:55:58,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:55:58,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:55:58,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:55:58,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:55:58,648 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-22 13:55:58,648 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-22 13:55:58,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:55:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:55:58,649 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:55:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-22 13:55:58,649 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-22 13:55:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:55:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-22 13:55:58,649 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-22 13:55:58,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:55:58,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-22 13:55:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:55:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:55:58,650 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:55:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:55:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-22 13:55:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-22 13:55:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-22 13:55:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-22 13:55:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 13:55:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 13:55:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:55:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-22 13:55:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-12-22 13:55:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:55:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 13:55:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 13:55:58,653 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-22 13:55:58,653 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-22 13:55:58,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:55:58,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:55:58,811 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:55:58,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:55:59,539 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:55:59,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:55:59,546 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-22 13:55:59,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:59 BoogieIcfgContainer [2021-12-22 13:55:59,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:55:59,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:55:59,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:55:59,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:55:59,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:55:56" (1/3) ... [2021-12-22 13:55:59,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ebe739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:59, skipping insertion in model container [2021-12-22 13:55:59,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:55:58" (2/3) ... [2021-12-22 13:55:59,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ebe739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:59, skipping insertion in model container [2021-12-22 13:55:59,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:59" (3/3) ... [2021-12-22 13:55:59,554 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_harness.i [2021-12-22 13:55:59,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:55:59,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:55:59,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:55:59,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:55:59,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:55:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-22 13:55:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 13:55:59,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:55:59,631 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:55:59,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:55:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:55:59,634 INFO L85 PathProgramCache]: Analyzing trace with hash -283420546, now seen corresponding path program 1 times [2021-12-22 13:55:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:55:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850251464] [2021-12-22 13:55:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:55:59,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:55:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:56:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:56:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:56:00,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:00,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850251464] [2021-12-22 13:56:00,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850251464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:00,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:00,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:56:00,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084103816] [2021-12-22 13:56:00,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:00,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:56:00,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:56:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:56:00,260 INFO L87 Difference]: Start difference. First operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:56:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:00,448 INFO L93 Difference]: Finished difference Result 376 states and 532 transitions. [2021-12-22 13:56:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:56:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2021-12-22 13:56:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:00,457 INFO L225 Difference]: With dead ends: 376 [2021-12-22 13:56:00,457 INFO L226 Difference]: Without dead ends: 189 [2021-12-22 13:56:00,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:56:00,463 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:00,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 294 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:56:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-22 13:56:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-12-22 13:56:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-22 13:56:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2021-12-22 13:56:00,498 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 82 [2021-12-22 13:56:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:00,498 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2021-12-22 13:56:00,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 13:56:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2021-12-22 13:56:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 13:56:00,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:00,502 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:00,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:56:00,502 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 426190495, now seen corresponding path program 1 times [2021-12-22 13:56:00,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:00,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311413943] [2021-12-22 13:56:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:00,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:56:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:56:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 13:56:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:56:00,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:00,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311413943] [2021-12-22 13:56:00,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311413943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:00,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205704654] [2021-12-22 13:56:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:00,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:00,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:00,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:56:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 13:56:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:56:01,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:01,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205704654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:01,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:01,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-22 13:56:01,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831913894] [2021-12-22 13:56:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:01,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:01,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:56:01,400 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:01,429 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2021-12-22 13:56:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:56:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-12-22 13:56:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:01,432 INFO L225 Difference]: With dead ends: 248 [2021-12-22 13:56:01,432 INFO L226 Difference]: Without dead ends: 173 [2021-12-22 13:56:01,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:56:01,433 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:01,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1130 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-22 13:56:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-22 13:56:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-22 13:56:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2021-12-22 13:56:01,444 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 92 [2021-12-22 13:56:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:01,445 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 220 transitions. [2021-12-22 13:56:01,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 220 transitions. [2021-12-22 13:56:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:56:01,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:01,448 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:01,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:01,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1901749225, now seen corresponding path program 1 times [2021-12-22 13:56:01,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018642096] [2021-12-22 13:56:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:01,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:56:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:56:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:56:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:56:01,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018642096] [2021-12-22 13:56:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018642096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2154464] [2021-12-22 13:56:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:01,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:01,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:01,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:56:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:56:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:56:02,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:02,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2154464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:02,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:02,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-12-22 13:56:02,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007806379] [2021-12-22 13:56:02,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:02,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:56:02,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:56:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:56:02,506 INFO L87 Difference]: Start difference. First operand 173 states and 220 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:56:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:02,644 INFO L93 Difference]: Finished difference Result 249 states and 320 transitions. [2021-12-22 13:56:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 95 [2021-12-22 13:56:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:02,646 INFO L225 Difference]: With dead ends: 249 [2021-12-22 13:56:02,646 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 13:56:02,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:56:02,647 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 78 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:02,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1119 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 13:56:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-22 13:56:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (49), 46 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-22 13:56:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-12-22 13:56:02,659 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 95 [2021-12-22 13:56:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:02,659 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-12-22 13:56:02,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 13:56:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-12-22 13:56:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 13:56:02,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:02,662 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:02,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:02,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 13:56:02,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1019605314, now seen corresponding path program 1 times [2021-12-22 13:56:02,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:02,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620149759] [2021-12-22 13:56:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:02,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:56:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 13:56:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:56:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:56:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:56:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:56:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620149759] [2021-12-22 13:56:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620149759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706032779] [2021-12-22 13:56:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:03,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:03,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:03,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:56:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:56:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:56:03,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:03,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706032779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:03,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:03,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-22 13:56:03,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479520395] [2021-12-22 13:56:03,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:03,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:03,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:56:03,672 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:56:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:03,801 INFO L93 Difference]: Finished difference Result 338 states and 429 transitions. [2021-12-22 13:56:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:56:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 101 [2021-12-22 13:56:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:03,803 INFO L225 Difference]: With dead ends: 338 [2021-12-22 13:56:03,803 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 13:56:03,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:56:03,804 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 249 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:03,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 481 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 13:56:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-22 13:56:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2021-12-22 13:56:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2021-12-22 13:56:03,825 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 101 [2021-12-22 13:56:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:03,825 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2021-12-22 13:56:03,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:56:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2021-12-22 13:56:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 13:56:03,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:03,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:03,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:04,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:04,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2090058387, now seen corresponding path program 2 times [2021-12-22 13:56:04,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:04,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163651544] [2021-12-22 13:56:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:04,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:56:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:56:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 13:56:04,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:04,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163651544] [2021-12-22 13:56:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163651544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:04,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960889698] [2021-12-22 13:56:04,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:56:04,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:04,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:04,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:56:04,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 13:56:04,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:56:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:56:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-22 13:56:04,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:04,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960889698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:04,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:04,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-22 13:56:04,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529195950] [2021-12-22 13:56:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:04,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:56:04,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:56:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:56:04,871 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:56:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:04,927 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2021-12-22 13:56:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:56:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 107 [2021-12-22 13:56:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:04,930 INFO L225 Difference]: With dead ends: 188 [2021-12-22 13:56:04,930 INFO L226 Difference]: Without dead ends: 186 [2021-12-22 13:56:04,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:56:04,931 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:04,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1493 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-22 13:56:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-12-22 13:56:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 121 states have internal predecessors, (135), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (54), 47 states have call predecessors, (54), 47 states have call successors, (54) [2021-12-22 13:56:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-12-22 13:56:04,941 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 107 [2021-12-22 13:56:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:04,941 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-12-22 13:56:04,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:56:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-12-22 13:56:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:56:04,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:04,943 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:04,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:05,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:05,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1813963275, now seen corresponding path program 1 times [2021-12-22 13:56:05,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:05,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36511489] [2021-12-22 13:56:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:05,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:56:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:56:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 13:56:05,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36511489] [2021-12-22 13:56:05,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36511489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953315031] [2021-12-22 13:56:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:05,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:05,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:05,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:05,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:56:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:56:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 13:56:06,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:06,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953315031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:06,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:06,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-22 13:56:06,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175849864] [2021-12-22 13:56:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:06,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:56:06,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:56:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:56:06,260 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-22 13:56:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:06,459 INFO L93 Difference]: Finished difference Result 342 states and 429 transitions. [2021-12-22 13:56:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:56:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 111 [2021-12-22 13:56:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:06,460 INFO L225 Difference]: With dead ends: 342 [2021-12-22 13:56:06,460 INFO L226 Difference]: Without dead ends: 182 [2021-12-22 13:56:06,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:56:06,462 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 275 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:06,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 775 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:56:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-22 13:56:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-12-22 13:56:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-22 13:56:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2021-12-22 13:56:06,471 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 111 [2021-12-22 13:56:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:06,471 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2021-12-22 13:56:06,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-22 13:56:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2021-12-22 13:56:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 13:56:06,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:06,473 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:06,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:06,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:06,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 693216864, now seen corresponding path program 1 times [2021-12-22 13:56:06,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:06,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403010498] [2021-12-22 13:56:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:06,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:06,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:56:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:56:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 13:56:07,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:07,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403010498] [2021-12-22 13:56:07,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403010498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:07,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:56:07,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:56:07,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001843360] [2021-12-22 13:56:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:07,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:56:07,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:56:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:07,183 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:07,522 INFO L93 Difference]: Finished difference Result 286 states and 361 transitions. [2021-12-22 13:56:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:56:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-12-22 13:56:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:07,524 INFO L225 Difference]: With dead ends: 286 [2021-12-22 13:56:07,524 INFO L226 Difference]: Without dead ends: 200 [2021-12-22 13:56:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:56:07,525 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 166 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:07,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 522 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:56:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-22 13:56:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2021-12-22 13:56:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-22 13:56:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 234 transitions. [2021-12-22 13:56:07,534 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 234 transitions. Word has length 117 [2021-12-22 13:56:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:07,534 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 234 transitions. [2021-12-22 13:56:07,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 234 transitions. [2021-12-22 13:56:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 13:56:07,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:07,535 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:56:07,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1457718631, now seen corresponding path program 1 times [2021-12-22 13:56:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244897702] [2021-12-22 13:56:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:07,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:56:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:56:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 13:56:07,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244897702] [2021-12-22 13:56:07,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244897702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868683480] [2021-12-22 13:56:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:07,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:07,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:07,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:56:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:08,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:56:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:56:08,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868683480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:08,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-22 13:56:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079790436] [2021-12-22 13:56:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:08,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:56:08,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:56:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:56:08,561 INFO L87 Difference]: Start difference. First operand 183 states and 234 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:56:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:08,692 INFO L93 Difference]: Finished difference Result 370 states and 486 transitions. [2021-12-22 13:56:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2021-12-22 13:56:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:08,694 INFO L225 Difference]: With dead ends: 370 [2021-12-22 13:56:08,694 INFO L226 Difference]: Without dead ends: 201 [2021-12-22 13:56:08,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:56:08,695 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 40 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:08,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 782 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-12-22 13:56:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-22 13:56:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-12-22 13:56:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 124 states have internal predecessors, (140), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-22 13:56:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-12-22 13:56:08,716 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 118 [2021-12-22 13:56:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:08,716 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-12-22 13:56:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-22 13:56:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-12-22 13:56:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 13:56:08,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:08,718 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:08,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:08,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:08,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1199553193, now seen corresponding path program 1 times [2021-12-22 13:56:08,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:08,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126397620] [2021-12-22 13:56:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:08,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:56:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:56:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 13:56:09,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:09,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126397620] [2021-12-22 13:56:09,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126397620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:09,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893235424] [2021-12-22 13:56:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:09,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:09,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:09,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:09,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:56:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 13:56:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:09,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 13:56:10,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:10,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-22 13:56:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 13:56:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893235424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:10,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:10,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 11] total 26 [2021-12-22 13:56:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200231279] [2021-12-22 13:56:10,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:10,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 13:56:10,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 13:56:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-22 13:56:10,773 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-22 13:56:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:12,203 INFO L93 Difference]: Finished difference Result 471 states and 618 transitions. [2021-12-22 13:56:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 13:56:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 118 [2021-12-22 13:56:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:12,205 INFO L225 Difference]: With dead ends: 471 [2021-12-22 13:56:12,205 INFO L226 Difference]: Without dead ends: 309 [2021-12-22 13:56:12,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 232 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:56:12,207 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 253 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:12,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1592 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1830 Invalid, 0 Unknown, 330 Unchecked, 1.2s Time] [2021-12-22 13:56:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-22 13:56:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-12-22 13:56:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 157 states have internal predecessors, (178), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (59), 50 states have call predecessors, (59), 51 states have call successors, (59) [2021-12-22 13:56:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 289 transitions. [2021-12-22 13:56:12,221 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 289 transitions. Word has length 118 [2021-12-22 13:56:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 289 transitions. [2021-12-22 13:56:12,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-22 13:56:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 289 transitions. [2021-12-22 13:56:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 13:56:12,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:12,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:12,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:12,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1264569920, now seen corresponding path program 1 times [2021-12-22 13:56:12,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561803865] [2021-12-22 13:56:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:12,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 13:56:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:56:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-22 13:56:12,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561803865] [2021-12-22 13:56:12,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561803865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027132731] [2021-12-22 13:56:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:12,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:12,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:12,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:56:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 13:56:13,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:13,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027132731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:13,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:13,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-22 13:56:13,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089481624] [2021-12-22 13:56:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:13,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:13,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:13,193 INFO L87 Difference]: Start difference. First operand 228 states and 289 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:13,218 INFO L93 Difference]: Finished difference Result 451 states and 576 transitions. [2021-12-22 13:56:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-12-22 13:56:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:13,220 INFO L225 Difference]: With dead ends: 451 [2021-12-22 13:56:13,220 INFO L226 Difference]: Without dead ends: 237 [2021-12-22 13:56:13,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:56:13,221 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 20 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 649 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-22 13:56:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-12-22 13:56:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 153 states have internal predecessors, (173), 52 states have call successors, (52), 20 states have call predecessors, (52), 21 states have return successors, (57), 50 states have call predecessors, (57), 51 states have call successors, (57) [2021-12-22 13:56:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-12-22 13:56:13,232 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 119 [2021-12-22 13:56:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:13,232 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-12-22 13:56:13,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-12-22 13:56:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 13:56:13,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:13,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:13,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:56:13,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:56:13,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1982077188, now seen corresponding path program 2 times [2021-12-22 13:56:13,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:13,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593065522] [2021-12-22 13:56:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:13,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 13:56:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:56:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:56:13,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:13,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593065522] [2021-12-22 13:56:13,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593065522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800255083] [2021-12-22 13:56:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:56:13,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:13,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:13,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:56:14,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:56:14,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:56:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:56:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-22 13:56:14,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:14,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800255083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:14,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:14,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-22 13:56:14,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116315799] [2021-12-22 13:56:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:14,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:56:14,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:56:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:56:14,716 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:14,767 INFO L93 Difference]: Finished difference Result 394 states and 495 transitions. [2021-12-22 13:56:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:56:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-12-22 13:56:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:14,769 INFO L225 Difference]: With dead ends: 394 [2021-12-22 13:56:14,769 INFO L226 Difference]: Without dead ends: 229 [2021-12-22 13:56:14,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:56:14,770 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:14,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1323 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-22 13:56:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-22 13:56:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 158 states have internal predecessors, (177), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (62), 50 states have call predecessors, (62), 51 states have call successors, (62) [2021-12-22 13:56:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 291 transitions. [2021-12-22 13:56:14,781 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 291 transitions. Word has length 123 [2021-12-22 13:56:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:14,781 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 291 transitions. [2021-12-22 13:56:14,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 291 transitions. [2021-12-22 13:56:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 13:56:14,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:14,782 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:14,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 13:56:15,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:15,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1351230667, now seen corresponding path program 1 times [2021-12-22 13:56:15,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:15,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400781226] [2021-12-22 13:56:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:15,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:56:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:56:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 13:56:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:56:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:56:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-22 13:56:15,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:15,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400781226] [2021-12-22 13:56:15,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400781226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:15,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480965702] [2021-12-22 13:56:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:15,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:15,400 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:15,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:56:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 13:56:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:16,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-22 13:56:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 13:56:16,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480965702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:16,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:16,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2021-12-22 13:56:16,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972173189] [2021-12-22 13:56:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:16,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:56:16,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:56:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:56:16,347 INFO L87 Difference]: Start difference. First operand 229 states and 291 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 13:56:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:16,848 INFO L93 Difference]: Finished difference Result 524 states and 702 transitions. [2021-12-22 13:56:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:56:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 126 [2021-12-22 13:56:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:16,850 INFO L225 Difference]: With dead ends: 524 [2021-12-22 13:56:16,850 INFO L226 Difference]: Without dead ends: 347 [2021-12-22 13:56:16,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:56:16,851 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 192 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:16,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1872 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 419 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2021-12-22 13:56:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-22 13:56:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 267. [2021-12-22 13:56:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 182 states have (on average 1.1373626373626373) internal successors, (207), 188 states have internal predecessors, (207), 56 states have call successors, (56), 23 states have call predecessors, (56), 28 states have return successors, (79), 55 states have call predecessors, (79), 55 states have call successors, (79) [2021-12-22 13:56:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2021-12-22 13:56:16,869 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 126 [2021-12-22 13:56:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:16,869 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2021-12-22 13:56:16,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 13:56:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2021-12-22 13:56:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 13:56:16,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:16,871 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:16,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:56:17,092 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1989755287, now seen corresponding path program 1 times [2021-12-22 13:56:17,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:17,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333958104] [2021-12-22 13:56:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:17,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:56:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:56:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-22 13:56:17,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333958104] [2021-12-22 13:56:17,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333958104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220419044] [2021-12-22 13:56:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:17,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:17,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:17,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:56:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:17,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 13:56:17,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:17,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220419044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:17,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:17,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-22 13:56:17,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522351439] [2021-12-22 13:56:17,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:17,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:17,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:17,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:17,842 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:17,878 INFO L93 Difference]: Finished difference Result 518 states and 665 transitions. [2021-12-22 13:56:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-22 13:56:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:17,880 INFO L225 Difference]: With dead ends: 518 [2021-12-22 13:56:17,880 INFO L226 Difference]: Without dead ends: 265 [2021-12-22 13:56:17,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:56:17,882 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 9 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:17,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 645 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-22 13:56:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-12-22 13:56:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 183 states have internal predecessors, (201), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 55 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-22 13:56:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 329 transitions. [2021-12-22 13:56:17,893 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 329 transitions. Word has length 125 [2021-12-22 13:56:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:17,894 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 329 transitions. [2021-12-22 13:56:17,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 329 transitions. [2021-12-22 13:56:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 13:56:17,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:17,895 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:17,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:18,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:56:18,130 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 44113837, now seen corresponding path program 1 times [2021-12-22 13:56:18,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:18,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662257327] [2021-12-22 13:56:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:18,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:56:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:56:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:56:18,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662257327] [2021-12-22 13:56:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662257327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094002592] [2021-12-22 13:56:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:18,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:18,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:56:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:56:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 13:56:18,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:18,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094002592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:18,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:18,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-22 13:56:18,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241305818] [2021-12-22 13:56:18,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:18,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:56:18,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:56:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:56:18,844 INFO L87 Difference]: Start difference. First operand 262 states and 329 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:18,869 INFO L93 Difference]: Finished difference Result 488 states and 627 transitions. [2021-12-22 13:56:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:56:18,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-22 13:56:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:18,871 INFO L225 Difference]: With dead ends: 488 [2021-12-22 13:56:18,871 INFO L226 Difference]: Without dead ends: 259 [2021-12-22 13:56:18,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:56:18,872 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 26 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:18,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 657 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:56:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-22 13:56:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-12-22 13:56:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 173 states have internal predecessors, (188), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (71), 55 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-22 13:56:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 315 transitions. [2021-12-22 13:56:18,882 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 315 transitions. Word has length 125 [2021-12-22 13:56:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:18,882 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 315 transitions. [2021-12-22 13:56:18,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 13:56:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 315 transitions. [2021-12-22 13:56:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 13:56:18,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:18,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:18,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-22 13:56:19,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:56:19,106 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash -308974545, now seen corresponding path program 1 times [2021-12-22 13:56:19,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:19,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202549956] [2021-12-22 13:56:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:19,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:56:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:56:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:56:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:56:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:56:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:56:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:56:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-22 13:56:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202549956] [2021-12-22 13:56:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202549956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046487329] [2021-12-22 13:56:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:19,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:19,345 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:19,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:56:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 13:56:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:19,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:20,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-22 13:56:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 13:56:20,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:56:20,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-22 13:56:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-22 13:56:20,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046487329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:56:20,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:56:20,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2021-12-22 13:56:20,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044148555] [2021-12-22 13:56:20,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:56:20,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:56:20,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:56:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:56:20,717 INFO L87 Difference]: Start difference. First operand 252 states and 315 transitions. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-22 13:56:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:21,997 INFO L93 Difference]: Finished difference Result 461 states and 586 transitions. [2021-12-22 13:56:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:56:21,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 125 [2021-12-22 13:56:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:21,999 INFO L225 Difference]: With dead ends: 461 [2021-12-22 13:56:21,999 INFO L226 Difference]: Without dead ends: 346 [2021-12-22 13:56:22,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-12-22 13:56:22,000 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 219 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:22,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1811 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1582 Invalid, 0 Unknown, 314 Unchecked, 1.1s Time] [2021-12-22 13:56:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-22 13:56:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 277. [2021-12-22 13:56:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 197 states have internal predecessors, (215), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (68), 56 states have call predecessors, (68), 55 states have call successors, (68) [2021-12-22 13:56:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2021-12-22 13:56:22,013 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 339 transitions. Word has length 125 [2021-12-22 13:56:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:22,013 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 339 transitions. [2021-12-22 13:56:22,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-22 13:56:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 339 transitions. [2021-12-22 13:56:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 13:56:22,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:22,015 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:22,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:22,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:56:22,236 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -564182680, now seen corresponding path program 1 times [2021-12-22 13:56:22,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:22,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167839434] [2021-12-22 13:56:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:22,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:56:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:56:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:56:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:56:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:56:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:56:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:56:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:56:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:56:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-22 13:56:22,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167839434] [2021-12-22 13:56:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167839434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815860467] [2021-12-22 13:56:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:22,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:22,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:22,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:56:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 13:56:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-22 13:56:23,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815860467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:23,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:23,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-22 13:56:23,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447297388] [2021-12-22 13:56:23,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:56:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:56:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:56:23,188 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-22 13:56:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:23,312 INFO L93 Difference]: Finished difference Result 544 states and 659 transitions. [2021-12-22 13:56:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:56:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2021-12-22 13:56:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:23,314 INFO L225 Difference]: With dead ends: 544 [2021-12-22 13:56:23,314 INFO L226 Difference]: Without dead ends: 263 [2021-12-22 13:56:23,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:56:23,315 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 12 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:23,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1639 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:56:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-22 13:56:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-22 13:56:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 180 states have (on average 1.1) internal successors, (198), 183 states have internal predecessors, (198), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (67), 56 states have call predecessors, (67), 55 states have call successors, (67) [2021-12-22 13:56:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 321 transitions. [2021-12-22 13:56:23,326 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 321 transitions. Word has length 131 [2021-12-22 13:56:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:23,327 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 321 transitions. [2021-12-22 13:56:23,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-22 13:56:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 321 transitions. [2021-12-22 13:56:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-22 13:56:23,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:23,328 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:23,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:23,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash 418439313, now seen corresponding path program 1 times [2021-12-22 13:56:23,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:23,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794912148] [2021-12-22 13:56:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:23,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:56:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:56:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:56:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:56:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 13:56:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-22 13:56:23,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794912148] [2021-12-22 13:56:23,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794912148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820986247] [2021-12-22 13:56:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:23,888 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:23,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 13:56:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 13:56:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:24,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:56:24,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-22 13:56:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 13:56:24,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:56:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820986247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:56:24,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:56:24,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-12-22 13:56:24,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336261718] [2021-12-22 13:56:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:56:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:56:24,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:56:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:56:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:56:24,783 INFO L87 Difference]: Start difference. First operand 263 states and 321 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-22 13:56:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:56:25,190 INFO L93 Difference]: Finished difference Result 512 states and 650 transitions. [2021-12-22 13:56:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:56:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 133 [2021-12-22 13:56:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:56:25,193 INFO L225 Difference]: With dead ends: 512 [2021-12-22 13:56:25,193 INFO L226 Difference]: Without dead ends: 334 [2021-12-22 13:56:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-22 13:56:25,194 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 168 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:56:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1636 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 322 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-12-22 13:56:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-22 13:56:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 269. [2021-12-22 13:56:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 189 states have internal predecessors, (203), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 56 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-22 13:56:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 331 transitions. [2021-12-22 13:56:25,206 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 331 transitions. Word has length 133 [2021-12-22 13:56:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:56:25,206 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 331 transitions. [2021-12-22 13:56:25,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-22 13:56:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 331 transitions. [2021-12-22 13:56:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-22 13:56:25,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:56:25,208 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:56:25,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 13:56:25,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:56:25,422 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:56:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:56:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1769824531, now seen corresponding path program 1 times [2021-12-22 13:56:25,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:56:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477933962] [2021-12-22 13:56:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:25,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:56:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 13:56:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 13:56:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:56:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:56:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:56:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:56:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:56:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:56:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:56:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:56:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:56:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:56:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:56:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 13:56:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-22 13:56:25,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:56:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477933962] [2021-12-22 13:56:25,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477933962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:56:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116092314] [2021-12-22 13:56:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:56:25,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:56:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:56:25,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:56:25,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 13:56:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:56:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-22 13:56:26,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:56:26,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:56:26,409 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 13:56:26,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 13:56:26,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:56:26,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 13:56:38,260 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 13:56:38,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-22 13:56:40,512 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:56:40,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-22 13:56:40,563 INFO L387 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 27 treesize of output 27 [2021-12-22 13:56:44,111 INFO L387 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 27 treesize of output 27 [2021-12-22 13:57:02,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-22 13:57:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 13:57:02,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:57:02,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1836 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_1836) |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.offset| 8)) 0))) is different from false [2021-12-22 13:57:02,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116092314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:57:02,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:57:02,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2021-12-22 13:57:02,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524342909] [2021-12-22 13:57:02,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 13:57:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 13:57:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:57:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 13:57:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=663, Unknown=6, NotChecked=52, Total=812 [2021-12-22 13:57:02,637 INFO L87 Difference]: Start difference. First operand 269 states and 331 transitions. Second operand has 26 states, 26 states have (on average 5.5) internal successors, (143), 23 states have internal predecessors, (143), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29)