./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_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_linked_list_remove_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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:01:39,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:01:39,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:01:39,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:01:39,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:01:39,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:01:39,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:01:39,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:01:39,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:01:39,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:01:39,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:01:39,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:01:39,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:01:39,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:01:39,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:01:39,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:01:39,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:01:39,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:01:39,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:01:39,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:01:39,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:01:39,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:01:39,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:01:39,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:01:39,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:01:39,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:01:39,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:01:39,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:01:39,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:01:39,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:01:39,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:01:39,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:01:39,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:01:39,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:01:39,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:01:39,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:01:39,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:01:39,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:01:39,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:01:39,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:01:39,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:01:39,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:01:39,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:01:39,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:01:39,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:01:39,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:01:39,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:01:39,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:01:39,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:01:39,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:01:39,335 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:01:39,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:01:39,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:01:39,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:01:39,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:01:39,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:01:39,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:01:39,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:01:39,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:01:39,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:01:39,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:01:39,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:01:39,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:01:39,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:01:39,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:01:39,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:01:39,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:01:39,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:01:39,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:01:39,340 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:01:39,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:01:39,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:01:39,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:01:39,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-12-22 14:01:39,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:01:39,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:01:39,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:01:39,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:01:39,564 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:01:39,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-22 14:01:39,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d36d41ff/59ca86a92df544fa9cd6c374679eac63/FLAGa2f4bda6b [2021-12-22 14:01:40,221 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:01:40,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-22 14:01:40,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d36d41ff/59ca86a92df544fa9cd6c374679eac63/FLAGa2f4bda6b [2021-12-22 14:01:40,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d36d41ff/59ca86a92df544fa9cd6c374679eac63 [2021-12-22 14:01:40,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:01:40,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:01:40,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:01:40,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:01:40,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:01:40,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:01:40" (1/1) ... [2021-12-22 14:01:40,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ae17de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:40, skipping insertion in model container [2021-12-22 14:01:40,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:01:40" (1/1) ... [2021-12-22 14:01:40,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:01:40,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:01:40,704 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_linked_list_remove_harness.i[4496,4509] [2021-12-22 14:01:40,710 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_linked_list_remove_harness.i[4556,4569] [2021-12-22 14:01:41,291 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,295 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,296 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,307 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,308 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,314 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,531 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:01:41,532 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:01:41,533 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:01:41,534 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:01:41,535 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:01:41,536 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:01:41,536 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:01:41,537 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:01:41,537 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:01:41,538 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:01:41,623 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:01:41,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:01:41,701 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:01:41,721 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_linked_list_remove_harness.i[4496,4509] [2021-12-22 14:01:41,722 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_linked_list_remove_harness.i[4556,4569] [2021-12-22 14:01:41,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,760 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,761 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,761 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,766 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,766 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,768 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:01:41,809 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:01:41,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:01:41,811 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:01:41,812 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:01:41,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:01:41,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:01:41,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:01:41,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:01:41,814 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:01:41,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:01:41,830 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:01:41,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:01:42,013 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:01:42,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42 WrapperNode [2021-12-22 14:01:42,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:01:42,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:01:42,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:01:42,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:01:42,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,148 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2021-12-22 14:01:42,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:01:42,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:01:42,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:01:42,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:01:42,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:01:42,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:01:42,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:01:42,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:01:42,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (1/1) ... [2021-12-22 14:01:42,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:01:42,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:42,229 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 14:01:42,230 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 14:01:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-22 14:01:42,255 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-22 14:01:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-22 14:01:42,256 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-22 14:01:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:01:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:01:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 14:01:42,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 14:01:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-22 14:01:42,257 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-22 14:01:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:01:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:01:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:01:42,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:01:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:01:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:01:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:01:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:01:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:01:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:01:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:01:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-22 14:01:42,259 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-22 14:01:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:01:42,480 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:01:42,481 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:01:42,698 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:01:42,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:01:42,704 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 14:01:42,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:01:42 BoogieIcfgContainer [2021-12-22 14:01:42,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:01:42,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:01:42,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:01:42,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:01:42,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:01:40" (1/3) ... [2021-12-22 14:01:42,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1d85fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:01:42, skipping insertion in model container [2021-12-22 14:01:42,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:01:42" (2/3) ... [2021-12-22 14:01:42,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1d85fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:01:42, skipping insertion in model container [2021-12-22 14:01:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:01:42" (3/3) ... [2021-12-22 14:01:42,714 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-12-22 14:01:42,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:01:42,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:01:42,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:01:42,772 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 14:01:42,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:01:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-22 14:01:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 14:01:42,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:42,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:42,801 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-12-22 14:01:42,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:42,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36137353] [2021-12-22 14:01:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:42,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:01:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:43,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:43,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36137353] [2021-12-22 14:01:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36137353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:43,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:01:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:01:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680244990] [2021-12-22 14:01:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:43,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:01:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:01:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:01:43,379 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 14:01:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:43,523 INFO L93 Difference]: Finished difference Result 147 states and 204 transitions. [2021-12-22 14:01:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:01:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-12-22 14:01:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:43,534 INFO L225 Difference]: With dead ends: 147 [2021-12-22 14:01:43,534 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 14:01:43,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:01:43,545 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 28 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:43,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 434 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:01:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 14:01:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-22 14:01:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 14:01:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-22 14:01:43,604 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2021-12-22 14:01:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-22 14:01:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 14:01:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-22 14:01:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 14:01:43,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:43,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:43,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:01:43,612 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash 209823880, now seen corresponding path program 1 times [2021-12-22 14:01:43,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309461127] [2021-12-22 14:01:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:43,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:01:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:43,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309461127] [2021-12-22 14:01:43,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309461127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:43,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:01:43,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 14:01:43,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827990002] [2021-12-22 14:01:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:43,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:01:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:01:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:01:43,880 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 14:01:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:44,201 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2021-12-22 14:01:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:01:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-22 14:01:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:44,204 INFO L225 Difference]: With dead ends: 143 [2021-12-22 14:01:44,204 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 14:01:44,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:01:44,209 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:44,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 244 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:01:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 14:01:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-12-22 14:01:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-12-22 14:01:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-22 14:01:44,231 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 54 [2021-12-22 14:01:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-22 14:01:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 14:01:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-22 14:01:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 14:01:44,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:44,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:44,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:01:44,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-12-22 14:01:44,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:44,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901186677] [2021-12-22 14:01:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:44,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:01:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:44,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:44,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901186677] [2021-12-22 14:01:44,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901186677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:44,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:01:44,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:01:44,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162907022] [2021-12-22 14:01:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:44,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:01:44,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:01:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:01:44,491 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 14:01:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:44,714 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-12-22 14:01:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:01:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-12-22 14:01:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:44,716 INFO L225 Difference]: With dead ends: 87 [2021-12-22 14:01:44,716 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 14:01:44,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:01:44,717 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 46 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:44,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 267 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:01:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 14:01:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-12-22 14:01:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 14:01:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-12-22 14:01:44,725 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 54 [2021-12-22 14:01:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:44,725 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-12-22 14:01:44,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 14:01:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-12-22 14:01:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 14:01:44,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:44,726 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:44,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:01:44,726 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2089548669, now seen corresponding path program 1 times [2021-12-22 14:01:44,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:44,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621358596] [2021-12-22 14:01:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:44,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 14:01:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:44,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:44,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621358596] [2021-12-22 14:01:44,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621358596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:01:44,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:01:44,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:01:44,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199455599] [2021-12-22 14:01:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:01:44,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:01:44,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:01:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:01:44,974 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 14:01:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:45,176 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2021-12-22 14:01:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:01:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-22 14:01:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:45,178 INFO L225 Difference]: With dead ends: 145 [2021-12-22 14:01:45,179 INFO L226 Difference]: Without dead ends: 82 [2021-12-22 14:01:45,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:01:45,180 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:45,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 177 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:01:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-22 14:01:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-22 14:01:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 14:01:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-12-22 14:01:45,199 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2021-12-22 14:01:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:45,199 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-12-22 14:01:45,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 14:01:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-12-22 14:01:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 14:01:45,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:45,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:45,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:01:45,206 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2021-12-22 14:01:45,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:45,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281986955] [2021-12-22 14:01:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:45,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:01:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:45,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281986955] [2021-12-22 14:01:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281986955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282084092] [2021-12-22 14:01:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:45,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:45,532 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 14:01:45,533 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 14:01:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 14:01:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:45,971 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 13 treesize of output 9 [2021-12-22 14:01:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:46,889 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 14 treesize of output 12 [2021-12-22 14:01:46,892 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 26 treesize of output 24 [2021-12-22 14:01:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282084092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:01:46,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:01:46,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-12-22 14:01:46,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527028652] [2021-12-22 14:01:46,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:46,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 14:01:46,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 14:01:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:01:46,977 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:47,553 INFO L93 Difference]: Finished difference Result 153 states and 185 transitions. [2021-12-22 14:01:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:01:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2021-12-22 14:01:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:47,555 INFO L225 Difference]: With dead ends: 153 [2021-12-22 14:01:47,555 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 14:01:47,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-12-22 14:01:47,556 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:47,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 400 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 428 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2021-12-22 14:01:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 14:01:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-12-22 14:01:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 14:01:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-22 14:01:47,572 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2021-12-22 14:01:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:47,572 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-22 14:01:47,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-22 14:01:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 14:01:47,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:47,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:47,606 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 14:01:47,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:47,800 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 2 times [2021-12-22 14:01:47,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:47,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666016279] [2021-12-22 14:01:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:47,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:47,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:48,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 14:01:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:48,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:48,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666016279] [2021-12-22 14:01:48,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666016279] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:48,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818302058] [2021-12-22 14:01:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:01:48,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:48,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:48,080 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 14:01:48,081 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 14:01:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:01:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:01:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 14:01:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:48,482 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 14 treesize of output 10 [2021-12-22 14:01:48,510 INFO L353 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2021-12-22 14:01:48,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-22 14:01:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:50,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:51,371 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 20 treesize of output 18 [2021-12-22 14:01:51,374 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 66 treesize of output 64 [2021-12-22 14:01:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:51,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818302058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:01:51,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:01:51,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2021-12-22 14:01:51,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539180348] [2021-12-22 14:01:51,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:51,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 14:01:51,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 14:01:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2021-12-22 14:01:51,478 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:52,166 INFO L93 Difference]: Finished difference Result 151 states and 183 transitions. [2021-12-22 14:01:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 14:01:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2021-12-22 14:01:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:52,168 INFO L225 Difference]: With dead ends: 151 [2021-12-22 14:01:52,168 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 14:01:52,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=652, Unknown=1, NotChecked=0, Total=756 [2021-12-22 14:01:52,169 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 48 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:52,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 440 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 558 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2021-12-22 14:01:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 14:01:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-22 14:01:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-22 14:01:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-12-22 14:01:52,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 56 [2021-12-22 14:01:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:52,177 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-12-22 14:01:52,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 19 states have internal predecessors, (56), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-12-22 14:01:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 14:01:52,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:52,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:52,206 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 14:01:52,399 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,SelfDestructingSolverStorable5 [2021-12-22 14:01:52,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 223290509, now seen corresponding path program 1 times [2021-12-22 14:01:52,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:52,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066685485] [2021-12-22 14:01:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:52,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 14:01:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 14:01:52,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066685485] [2021-12-22 14:01:52,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066685485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581505853] [2021-12-22 14:01:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:52,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:52,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:52,699 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 14:01:52,700 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 14:01:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 14:01:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:53,050 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 14 treesize of output 10 [2021-12-22 14:01:53,082 INFO L353 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-22 14:01:53,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 14:01:53,121 INFO L353 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2021-12-22 14:01:53,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-12-22 14:01:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:01:56,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-22 14:01:56,256 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 386 treesize of output 378 [2021-12-22 14:01:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:56,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581505853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:01:56,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:01:56,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 26 [2021-12-22 14:01:56,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328232365] [2021-12-22 14:01:56,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:01:56,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 14:01:56,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:01:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 14:01:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=572, Unknown=1, NotChecked=0, Total=650 [2021-12-22 14:01:56,444 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:01:57,304 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2021-12-22 14:01:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 14:01:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 60 [2021-12-22 14:01:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:01:57,306 INFO L225 Difference]: With dead ends: 176 [2021-12-22 14:01:57,306 INFO L226 Difference]: Without dead ends: 111 [2021-12-22 14:01:57,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=134, Invalid=1055, Unknown=1, NotChecked=0, Total=1190 [2021-12-22 14:01:57,307 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 50 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:01:57,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 591 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 541 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2021-12-22 14:01:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-22 14:01:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-12-22 14:01:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 71 states have internal predecessors, (79), 19 states have call successors, (19), 8 states have call predecessors, (19), 12 states have return successors, (23), 18 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-22 14:01:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-12-22 14:01:57,319 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 60 [2021-12-22 14:01:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:01:57,319 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-12-22 14:01:57,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-22 14:01:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-12-22 14:01:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 14:01:57,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:01:57,320 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:01:57,348 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 14:01:57,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:57,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:01:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:01:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash 25790573, now seen corresponding path program 2 times [2021-12-22 14:01:57,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:01:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717353533] [2021-12-22 14:01:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:01:57,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:01:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:01:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:01:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:01:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:01:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 14:01:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 14:01:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 14:01:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:01:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 14:01:57,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:01:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717353533] [2021-12-22 14:01:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717353533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:01:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540501489] [2021-12-22 14:01:57,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:01:57,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:01:57,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:01:57,882 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 14:01:57,884 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 14:01:58,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:01:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:01:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 14:01:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:01:58,296 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 14 treesize of output 10 [2021-12-22 14:01:58,327 INFO L353 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2021-12-22 14:01:58,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-22 14:01:58,392 INFO L353 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-22 14:01:58,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-22 14:01:58,458 INFO L353 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-22 14:01:58,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-22 14:01:58,525 INFO L353 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-12-22 14:01:58,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-22 14:01:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:01:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:19,800 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 37 treesize of output 35 [2021-12-22 14:02:19,819 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 790510 treesize of output 786414