./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 fcb8e130 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 0.2.1-dev-fcb8e13 [2021-11-22 20:26:25,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 20:26:25,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 20:26:25,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 20:26:25,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 20:26:25,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 20:26:25,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 20:26:25,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 20:26:25,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 20:26:25,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 20:26:25,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 20:26:25,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 20:26:25,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 20:26:25,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 20:26:25,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 20:26:25,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 20:26:25,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 20:26:25,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 20:26:25,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 20:26:25,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 20:26:25,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 20:26:25,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 20:26:25,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 20:26:25,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 20:26:25,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 20:26:25,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 20:26:25,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 20:26:25,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 20:26:25,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 20:26:25,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 20:26:25,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 20:26:25,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 20:26:25,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 20:26:25,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 20:26:25,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 20:26:25,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 20:26:25,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 20:26:25,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 20:26:25,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 20:26:25,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 20:26:25,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 20:26:25,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 20:26:25,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 20:26:25,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 20:26:25,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 20:26:25,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 20:26:25,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 20:26:25,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 20:26:25,324 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 20:26:25,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 20:26:25,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 20:26:25,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 20:26:25,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 20:26:25,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 20:26:25,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 20:26:25,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:26:25,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 20:26:25,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 20:26:25,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 20:26:25,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 20:26:25,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 20:26:25,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 20:26:25,327 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 20:26:25,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 20:26:25,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 20:26:25,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-11-22 20:26:25,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 20:26:25,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 20:26:25,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 20:26:25,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 20:26:25,529 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 20:26:25,530 INFO L432 ainManager$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 [2021-11-22 20:26:25,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa09edf40/8a274ba96ef74784a1306ffeda3398cf/FLAG3e336a2f4 [2021-11-22 20:26:26,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 20:26:26,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-11-22 20:26:26,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa09edf40/8a274ba96ef74784a1306ffeda3398cf/FLAG3e336a2f4 [2021-11-22 20:26:26,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa09edf40/8a274ba96ef74784a1306ffeda3398cf [2021-11-22 20:26:26,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 20:26:26,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 20:26:26,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 20:26:26,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 20:26:26,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 20:26:26,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:26:26" (1/1) ... [2021-11-22 20:26:26,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10745234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:26, skipping insertion in model container [2021-11-22 20:26:26,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:26:26" (1/1) ... [2021-11-22 20:26:26,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 20:26:26,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 20:26:26,869 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] [2021-11-22 20:26:26,877 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] [2021-11-22 20:26:27,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,325 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,326 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,327 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,328 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,337 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,340 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,345 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,516 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:26:27,517 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:26:27,518 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:26:27,519 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:26:27,520 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:26:27,521 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:26:27,521 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:26:27,521 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:26:27,522 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:26:27,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:26:27,599 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:26:27,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:26:27,640 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 20:26:27,648 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] [2021-11-22 20:26:27,649 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] [2021-11-22 20:26:27,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,699 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,699 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-22 20:26:27,766 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-22 20:26:27,766 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-22 20:26:27,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-22 20:26:27,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-22 20:26:27,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-22 20:26:27,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-22 20:26:27,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-22 20:26:27,768 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-22 20:26:27,769 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-22 20:26:27,769 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-22 20:26:27,781 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-22 20:26:27,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 20:26:27,886 INFO L208 MainTranslator]: Completed translation [2021-11-22 20:26:27,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27 WrapperNode [2021-11-22 20:26:27,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 20:26:27,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 20:26:27,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 20:26:27,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 20:26:27,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:27,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,002 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 547, calls inlined = 21, statements flattened = 220 [2021-11-22 20:26:28,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 20:26:28,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 20:26:28,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 20:26:28,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 20:26:28,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 20:26:28,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 20:26:28,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 20:26:28,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 20:26:28,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (1/1) ... [2021-11-22 20:26:28,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 20:26:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:28,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 20:26:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 20:26:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 20:26:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 20:26:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 20:26:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 20:26:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 20:26:28,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 20:26:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 20:26:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 20:26:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 20:26:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 20:26:28,330 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 20:26:28,331 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 20:26:28,531 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 20:26:28,536 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 20:26:28,536 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 20:26:28,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:26:28 BoogieIcfgContainer [2021-11-22 20:26:28,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 20:26:28,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 20:26:28,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 20:26:28,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 20:26:28,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 08:26:26" (1/3) ... [2021-11-22 20:26:28,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eb1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:26:28, skipping insertion in model container [2021-11-22 20:26:28,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:26:27" (2/3) ... [2021-11-22 20:26:28,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eb1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:26:28, skipping insertion in model container [2021-11-22 20:26:28,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:26:28" (3/3) ... [2021-11-22 20:26:28,545 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-11-22 20:26:28,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 20:26:28,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-22 20:26:28,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 20:26:28,604 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 20:26:28,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-22 20:26:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 20:26:28,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:28,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:28,620 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 444327765, now seen corresponding path program 1 times [2021-11-22 20:26:28,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:28,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924910424] [2021-11-22 20:26:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:28,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:28,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924910424] [2021-11-22 20:26:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924910424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:26:28,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:26:28,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 20:26:28,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909239163] [2021-11-22 20:26:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:26:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 20:26:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 20:26:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:26:28,938 INFO L87 Difference]: Start difference. First operand has 74 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:28,958 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2021-11-22 20:26:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 20:26:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 20:26:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:28,967 INFO L225 Difference]: With dead ends: 140 [2021-11-22 20:26:28,967 INFO L226 Difference]: Without dead ends: 69 [2021-11-22 20:26:28,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 20:26:28,973 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:28,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:26:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-22 20:26:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-22 20:26:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 68 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-22 20:26:29,010 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 25 [2021-11-22 20:26:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:29,012 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-22 20:26:29,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-22 20:26:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 20:26:29,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:29,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:29,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 20:26:29,014 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 88335055, now seen corresponding path program 1 times [2021-11-22 20:26:29,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:29,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398545913] [2021-11-22 20:26:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:29,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:29,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:29,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398545913] [2021-11-22 20:26:29,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398545913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:26:29,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:26:29,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 20:26:29,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914385412] [2021-11-22 20:26:29,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:26:29,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 20:26:29,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 20:26:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 20:26:29,194 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:29,278 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2021-11-22 20:26:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:26:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 20:26:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:29,279 INFO L225 Difference]: With dead ends: 111 [2021-11-22 20:26:29,280 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 20:26:29,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 20:26:29,281 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 49 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:29,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 214 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:26:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 20:26:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2021-11-22 20:26:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.28125) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-11-22 20:26:29,291 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 28 [2021-11-22 20:26:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:29,291 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-11-22 20:26:29,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-11-22 20:26:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 20:26:29,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:29,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 20:26:29,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash 89943769, now seen corresponding path program 1 times [2021-11-22 20:26:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:29,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652300774] [2021-11-22 20:26:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:29,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:29,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652300774] [2021-11-22 20:26:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652300774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 20:26:29,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 20:26:29,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 20:26:29,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438130741] [2021-11-22 20:26:29,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 20:26:29,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 20:26:29,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:29,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 20:26:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 20:26:29,475 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:29,483 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2021-11-22 20:26:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 20:26:29,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 20:26:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:29,484 INFO L225 Difference]: With dead ends: 123 [2021-11-22 20:26:29,484 INFO L226 Difference]: Without dead ends: 72 [2021-11-22 20:26:29,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 20:26:29,486 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:29,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:26:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-22 20:26:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-22 20:26:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-11-22 20:26:29,495 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 28 [2021-11-22 20:26:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-11-22 20:26:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-11-22 20:26:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 20:26:29,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:29,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:29,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 20:26:29,496 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash -549704168, now seen corresponding path program 1 times [2021-11-22 20:26:29,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:29,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337968820] [2021-11-22 20:26:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:29,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:29,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337968820] [2021-11-22 20:26:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337968820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:26:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093586371] [2021-11-22 20:26:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:29,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:29,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:29,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:26:29,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 20:26:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-22 20:26:29,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:26:29,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:26:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 20:26:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:26:30,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 20:26:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:30,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093586371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:26:30,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:26:30,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2021-11-22 20:26:30,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492460806] [2021-11-22 20:26:30,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:26:30,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 20:26:30,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 20:26:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-22 20:26:30,264 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:30,343 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2021-11-22 20:26:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 20:26:30,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 20:26:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:30,345 INFO L225 Difference]: With dead ends: 124 [2021-11-22 20:26:30,345 INFO L226 Difference]: Without dead ends: 73 [2021-11-22 20:26:30,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-22 20:26:30,346 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:30,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 600 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 20:26:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-22 20:26:30,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-22 20:26:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-11-22 20:26:30,350 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 29 [2021-11-22 20:26:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:30,350 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-11-22 20:26:30,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-11-22 20:26:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 20:26:30,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:30,351 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:30,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 20:26:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:30,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1096046265, now seen corresponding path program 2 times [2021-11-22 20:26:30,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862957598] [2021-11-22 20:26:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:30,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:30,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862957598] [2021-11-22 20:26:30,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862957598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:26:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787627718] [2021-11-22 20:26:30,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 20:26:30,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:30,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:26:30,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 20:26:31,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 20:26:31,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:26:31,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-22 20:26:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:26:31,183 INFO L354 Elim1Store]: treesize reduction 92, result has 24.0 percent of original size [2021-11-22 20:26:31,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 109 [2021-11-22 20:26:31,238 INFO L354 Elim1Store]: treesize reduction 150, result has 22.3 percent of original size [2021-11-22 20:26:31,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 170 [2021-11-22 20:26:31,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 168 [2021-11-22 20:26:31,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 167 [2021-11-22 20:26:31,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 170 [2021-11-22 20:26:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 284 [2021-11-22 20:26:31,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 284 [2021-11-22 20:26:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 283 [2021-11-22 20:26:31,374 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-22 20:26:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-11-22 20:26:31,397 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-22 20:26:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-11-22 20:26:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-22 20:26:31,414 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-22 20:26:31,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-22 20:26:31,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-22 20:26:31,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 20:26:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2021-11-22 20:26:31,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-22 20:26:31,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-22 20:26:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:26:31,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 20:26:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:31,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:26:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 264 [2021-11-22 20:26:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787627718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:26:32,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:26:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 7] total 18 [2021-11-22 20:26:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203979583] [2021-11-22 20:26:32,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:26:32,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 20:26:32,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 20:26:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-22 20:26:32,045 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:32,257 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2021-11-22 20:26:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 20:26:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 20:26:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:32,258 INFO L225 Difference]: With dead ends: 163 [2021-11-22 20:26:32,258 INFO L226 Difference]: Without dead ends: 112 [2021-11-22 20:26:32,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-22 20:26:32,259 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 174 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:32,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 656 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-22 20:26:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-22 20:26:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2021-11-22 20:26:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-11-22 20:26:32,263 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 30 [2021-11-22 20:26:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-11-22 20:26:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-11-22 20:26:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 20:26:32,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:32,275 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 20:26:32,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 20:26:32,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:32,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 574702136, now seen corresponding path program 3 times [2021-11-22 20:26:32,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:32,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161532564] [2021-11-22 20:26:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:32,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:32,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:32,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161532564] [2021-11-22 20:26:32,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161532564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:26:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724154608] [2021-11-22 20:26:32,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 20:26:32,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:32,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:32,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:26:32,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 20:26:33,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 20:26:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:26:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-22 20:26:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:26:33,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:26:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:33,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-22 20:26:33,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:26:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-22 20:26:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:33,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:26:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4712 treesize of output 4584 [2021-11-22 20:26:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724154608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:26:37,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:26:37,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 21 [2021-11-22 20:26:37,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566120203] [2021-11-22 20:26:37,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:26:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 20:26:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 20:26:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-22 20:26:37,852 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:38,250 INFO L93 Difference]: Finished difference Result 257 states and 292 transitions. [2021-11-22 20:26:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 20:26:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 20:26:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:38,253 INFO L225 Difference]: With dead ends: 257 [2021-11-22 20:26:38,253 INFO L226 Difference]: Without dead ends: 206 [2021-11-22 20:26:38,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-11-22 20:26:38,257 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 222 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:38,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1139 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 164 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2021-11-22 20:26:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-22 20:26:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 81. [2021-11-22 20:26:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-22 20:26:38,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 31 [2021-11-22 20:26:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:38,269 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-22 20:26:38,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-22 20:26:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 20:26:38,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:38,272 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:38,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 20:26:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:38,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1202598312, now seen corresponding path program 4 times [2021-11-22 20:26:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913329387] [2021-11-22 20:26:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:38,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:38,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:38,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913329387] [2021-11-22 20:26:38,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913329387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:26:38,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282416229] [2021-11-22 20:26:38,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 20:26:38,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:38,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:26:38,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 20:26:38,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 20:26:38,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:26:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 20:26:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:26:38,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:26:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:38,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:26:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-22 20:26:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:39,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2021-11-22 20:26:39,099 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-22 20:26:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 56 [2021-11-22 20:26:39,205 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-22 20:26:39,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 16 [2021-11-22 20:26:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:39,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:26:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4712 treesize of output 4680 [2021-11-22 20:26:40,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 20:26:40,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:26:40,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-22 20:26:40,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107376763] [2021-11-22 20:26:40,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 20:26:40,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 20:26:40,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:26:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 20:26:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-22 20:26:40,305 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:26:40,340 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2021-11-22 20:26:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 20:26:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 20:26:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:26:40,341 INFO L225 Difference]: With dead ends: 133 [2021-11-22 20:26:40,341 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 20:26:40,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-22 20:26:40,342 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:26:40,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:26:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 20:26:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-22 20:26:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-11-22 20:26:40,356 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 33 [2021-11-22 20:26:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:26:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-11-22 20:26:40,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:26:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-11-22 20:26:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 20:26:40,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:26:40,359 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:26:40,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 20:26:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:40,572 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:26:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:26:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1963803015, now seen corresponding path program 5 times [2021-11-22 20:26:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:26:40,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608300043] [2021-11-22 20:26:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:26:40,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:26:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:26:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:40,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:26:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608300043] [2021-11-22 20:26:40,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608300043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:26:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480217768] [2021-11-22 20:26:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 20:26:40,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:26:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:26:40,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:26:40,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 20:26:41,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 20:26:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:26:41,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-22 20:26:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:26:41,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 20:26:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-22 20:26:41,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 20:26:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2021-11-22 20:26:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:26:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2021-11-22 20:26:41,663 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-22 20:26:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 56 [2021-11-22 20:26:41,775 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-22 20:26:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 19 [2021-11-22 20:26:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:26:41,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:26:42,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr680#1| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.base|) (+ |c_ULTIMATE.start_#Ultimate.C_memset_#ptr#1.offset| |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr680#1|) |c_ULTIMATE.start_#Ultimate.C_memset_#value#1|)) |c_ULTIMATE.start_aws_linked_list_node_reset_~node#1.base|) |c_ULTIMATE.start_aws_linked_list_node_reset_~node#1.offset|))) (<= (div (* .cse0 (- 1)) (- 256)) (+ (div (+ .cse0 (- 256)) 256) 1)))) is different from false [2021-11-22 20:26:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18644 treesize of output 18580 [2021-11-22 20:27:24,223 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 20:27:24,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 20:27:24,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-22 20:27:24,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116242658] [2021-11-22 20:27:24,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 20:27:24,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 20:27:24,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:27:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 20:27:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2021-11-22 20:27:24,225 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:27:24,257 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2021-11-22 20:27:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 20:27:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 20:27:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:27:24,258 INFO L225 Difference]: With dead ends: 129 [2021-11-22 20:27:24,259 INFO L226 Difference]: Without dead ends: 78 [2021-11-22 20:27:24,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2021-11-22 20:27:24,259 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 20:27:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 20:27:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-22 20:27:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-22 20:27:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2021-11-22 20:27:24,263 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 34 [2021-11-22 20:27:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:27:24,263 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2021-11-22 20:27:24,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2021-11-22 20:27:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 20:27:24,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:27:24,264 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 20:27:24,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 20:27:24,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:27:24,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:27:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:27:24,472 INFO L85 PathProgramCache]: Analyzing trace with hash 208654968, now seen corresponding path program 6 times [2021-11-22 20:27:24,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:27:24,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682930139] [2021-11-22 20:27:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:27:24,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:27:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:27:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:27:24,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:27:24,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682930139] [2021-11-22 20:27:24,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682930139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:27:24,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817467416] [2021-11-22 20:27:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 20:27:24,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:27:24,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:27:24,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:27:24,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 20:27:26,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-22 20:27:26,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 20:27:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-22 20:27:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:27:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-22 20:27:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:27:26,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:27:26,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 20:27:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:27:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817467416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 20:27:27,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 20:27:27,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 13] total 31 [2021-11-22 20:27:27,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336453627] [2021-11-22 20:27:27,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 20:27:27,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 20:27:27,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 20:27:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 20:27:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2021-11-22 20:27:27,142 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 20:27:56,310 INFO L93 Difference]: Finished difference Result 898 states and 1020 transitions. [2021-11-22 20:27:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-22 20:27:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 20:27:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 20:27:56,313 INFO L225 Difference]: With dead ends: 898 [2021-11-22 20:27:56,313 INFO L226 Difference]: Without dead ends: 847 [2021-11-22 20:27:56,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=1156, Invalid=3956, Unknown=0, NotChecked=0, Total=5112 [2021-11-22 20:27:56,317 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 5647 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5647 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-22 20:27:56,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5647 Valid, 1100 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-22 20:27:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-22 20:27:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 92. [2021-11-22 20:27:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 91 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2021-11-22 20:27:56,328 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 35 [2021-11-22 20:27:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 20:27:56,328 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2021-11-22 20:27:56,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 20:27:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2021-11-22 20:27:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 20:27:56,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 20:27:56,331 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-11-22 20:27:56,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 20:27:56,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:27:56,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 20:27:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 20:27:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1011580207, now seen corresponding path program 1 times [2021-11-22 20:27:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 20:27:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672051935] [2021-11-22 20:27:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:27:56,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 20:27:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:27:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 20:27:56,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 20:27:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672051935] [2021-11-22 20:27:56,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672051935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 20:27:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116532449] [2021-11-22 20:27:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 20:27:56,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 20:27:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 20:27:56,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 20:27:56,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 20:27:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 20:27:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 20:27:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 20:27:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-22 20:27:57,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-22 20:27:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,252 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:27:57,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:27:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,295 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:27:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:27:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,342 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:27:57,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:27:57,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,388 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:27:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:27:57,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 20:27:57,436 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 20:27:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 20:27:57,480 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-22 20:27:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-22 20:27:57,570 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 20:27:57,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-22 20:27:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 20:27:57,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 20:29:04,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20963131652 treesize of output 20937965828 Killed by 15