./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_priority_queue_init_static_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 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:40:17,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:40:17,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:40:17,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:40:17,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:40:17,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:40:17,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:40:17,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:40:17,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:40:17,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:40:17,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:40:17,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:40:17,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:40:17,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:40:17,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:40:17,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:40:17,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:40:17,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:40:17,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:40:17,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:40:17,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:40:17,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:40:17,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:40:17,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:40:17,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:40:17,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:40:17,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:40:17,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:40:17,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:40:17,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:40:17,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:40:17,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:40:17,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:40:17,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:40:17,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:40:17,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:40:17,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:40:17,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:40:17,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:40:17,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:40:17,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:40:17,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:40:17,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:40:17,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:40:17,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:40:17,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:40:17,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:40:17,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:40:17,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:40:17,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:40:17,256 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:40:17,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:40:17,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:40:17,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:40:17,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:40:17,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:40:17,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:40:17,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:40:17,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:40:17,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:40:17,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:40:17,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:40:17,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:40:17,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:40:17,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:40:17,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:40:17,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:40:17,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:40:17,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:40:17,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:40:17,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:40:17,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:40:17,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:40:17,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d [2021-11-16 21:40:17,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:40:17,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:40:17,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:40:17,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:40:17,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:40:17,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2021-11-16 21:40:17,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef81fd3e/19ac559688ec459aa7267201ca1533a4/FLAGf50d47721 [2021-11-16 21:40:18,192 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:40:18,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2021-11-16 21:40:18,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef81fd3e/19ac559688ec459aa7267201ca1533a4/FLAGf50d47721 [2021-11-16 21:40:18,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef81fd3e/19ac559688ec459aa7267201ca1533a4 [2021-11-16 21:40:18,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:40:18,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:40:18,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:40:18,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:40:18,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:40:18,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:40:18" (1/1) ... [2021-11-16 21:40:18,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc4612e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:18, skipping insertion in model container [2021-11-16 21:40:18,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:40:18" (1/1) ... [2021-11-16 21:40:18,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:40:18,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:40:18,870 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_priority_queue_init_static_harness.i[4504,4517] [2021-11-16 21:40:18,877 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_priority_queue_init_static_harness.i[4564,4577] [2021-11-16 21:40:18,898 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:40:18,902 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:40:19,416 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:40:19,476 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,476 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,477 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,477 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,478 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,486 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,486 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,487 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,488 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,690 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:40:19,691 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:40:19,692 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:40:19,698 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:40:19,699 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:40:19,701 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:40:19,701 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:40:19,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:40:19,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:40:19,704 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:40:19,833 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,834 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,870 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:40:19,900 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:40:19,919 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_priority_queue_init_static_harness.i[4504,4517] [2021-11-16 21:40:19,926 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_priority_queue_init_static_harness.i[4564,4577] [2021-11-16 21:40:19,927 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:40:19,928 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:40:19,957 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:40:19,970 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,972 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,972 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,974 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,975 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,979 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,979 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,980 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:19,980 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:20,012 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:40:20,013 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:40:20,014 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:40:20,014 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:40:20,015 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:40:20,016 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:40:20,016 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:40:20,018 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:40:20,018 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:40:20,019 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:40:20,078 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:20,082 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:40:20,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:40:20,293 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:40:20,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20 WrapperNode [2021-11-16 21:40:20,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:40:20,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:40:20,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:40:20,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:40:20,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,453 INFO L137 Inliner]: procedures = 691, calls = 1511, calls flagged for inlining = 54, calls inlined = 9, statements flattened = 650 [2021-11-16 21:40:20,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:40:20,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:40:20,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:40:20,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:40:20,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:40:20,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:40:20,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:40:20,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:40:20,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (1/1) ... [2021-11-16 21:40:20,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:40:20,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:40:20,597 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) [2021-11-16 21:40:20,599 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 [2021-11-16 21:40:20,628 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-16 21:40:20,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-16 21:40:20,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:40:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-16 21:40:20,629 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-16 21:40:20,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:40:20,630 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 21:40:20,631 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 21:40:20,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:40:20,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:40:20,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:40:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:40:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:40:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:40:20,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:40:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 21:40:20,633 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 21:40:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 21:40:20,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 21:40:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-11-16 21:40:20,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:40:20,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:40:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 21:40:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 21:40:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:40:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:40:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 21:40:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-16 21:40:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-16 21:40:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-16 21:40:20,636 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-16 21:40:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:40:20,921 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:40:20,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:40:22,424 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:40:22,433 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:40:22,433 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-16 21:40:22,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:40:22 BoogieIcfgContainer [2021-11-16 21:40:22,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:40:22,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:40:22,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:40:22,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:40:22,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:40:18" (1/3) ... [2021-11-16 21:40:22,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e20b306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:40:22, skipping insertion in model container [2021-11-16 21:40:22,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:40:20" (2/3) ... [2021-11-16 21:40:22,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e20b306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:40:22, skipping insertion in model container [2021-11-16 21:40:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:40:22" (3/3) ... [2021-11-16 21:40:22,441 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_static_harness.i [2021-11-16 21:40:22,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:40:22,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:40:22,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:40:22,503 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 [2021-11-16 21:40:22,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:40:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-16 21:40:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-16 21:40:22,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:40:22,533 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:40:22,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:40:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:40:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash 602311799, now seen corresponding path program 1 times [2021-11-16 21:40:22,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:40:22,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875752279] [2021-11-16 21:40:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:22,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:40:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:23,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:40:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:40:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:23,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:40:23,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:40:23,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875752279] [2021-11-16 21:40:23,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-16 21:40:23,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655042549] [2021-11-16 21:40:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:23,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:40:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:40:23,050 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) [2021-11-16 21:40:23,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 21:40:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-16 21:40:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:40:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-16 21:40:23,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:40:23,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655042549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:40:23,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:40:23,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-16 21:40:23,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189093090] [2021-11-16 21:40:23,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:40:23,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 21:40:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:40:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 21:40:23,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:40:23,807 INFO L87 Difference]: Start difference. First operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:40:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:40:23,858 INFO L93 Difference]: Finished difference Result 291 states and 418 transitions. [2021-11-16 21:40:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 21:40:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2021-11-16 21:40:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:40:23,871 INFO L225 Difference]: With dead ends: 291 [2021-11-16 21:40:23,871 INFO L226 Difference]: Without dead ends: 141 [2021-11-16 21:40:23,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:40:23,884 INFO L933 BasicCegarLoop]: 190 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, 190 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 [2021-11-16 21:40:23,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:40:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-16 21:40:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-16 21:40:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 90 states have internal predecessors, (106), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-16 21:40:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2021-11-16 21:40:23,949 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 110 [2021-11-16 21:40:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:40:23,950 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-11-16 21:40:23,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:40:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2021-11-16 21:40:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-16 21:40:23,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:40:23,958 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:40:23,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 21:40:24,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-16 21:40:24,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:40:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:40:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1578415580, now seen corresponding path program 1 times [2021-11-16 21:40:24,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:40:24,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691991801] [2021-11-16 21:40:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:24,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:40:24,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:40:24,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8432331] [2021-11-16 21:40:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:24,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:40:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:40:24,249 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) [2021-11-16 21:40:24,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 21:40:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:24,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 2233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:40:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:40:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-16 21:40:24,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:40:24,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:40:24,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691991801] [2021-11-16 21:40:24,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:40:24,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8432331] [2021-11-16 21:40:24,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8432331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:40:24,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:40:24,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 21:40:24,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225393056] [2021-11-16 21:40:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:40:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:40:24,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:40:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:40:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:40:24,961 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:40:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:40:25,128 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2021-11-16 21:40:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:40:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 127 [2021-11-16 21:40:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:40:25,133 INFO L225 Difference]: With dead ends: 237 [2021-11-16 21:40:25,133 INFO L226 Difference]: Without dead ends: 143 [2021-11-16 21:40:25,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:40:25,135 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 62 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:40:25,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 862 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:40:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-16 21:40:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-16 21:40:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 92 states have internal predecessors, (107), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:40:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2021-11-16 21:40:25,148 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 127 [2021-11-16 21:40:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:40:25,149 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2021-11-16 21:40:25,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-16 21:40:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2021-11-16 21:40:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-16 21:40:25,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:40:25,151 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:40:25,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:40:25,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-16 21:40:25,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:40:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:40:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1074934923, now seen corresponding path program 1 times [2021-11-16 21:40:25,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:40:25,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301915752] [2021-11-16 21:40:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:25,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:40:25,406 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:40:25,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687141233] [2021-11-16 21:40:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:25,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:40:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:40:25,408 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) [2021-11-16 21:40:25,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 21:40:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:25,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:40:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:40:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:40:26,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:40:26,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:40:26,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301915752] [2021-11-16 21:40:26,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:40:26,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687141233] [2021-11-16 21:40:26,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687141233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:40:26,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:40:26,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 21:40:26,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459151201] [2021-11-16 21:40:26,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:40:26,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:40:26,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:40:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:40:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:40:26,094 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:40:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:40:26,126 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2021-11-16 21:40:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:40:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 142 [2021-11-16 21:40:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:40:26,129 INFO L225 Difference]: With dead ends: 244 [2021-11-16 21:40:26,129 INFO L226 Difference]: Without dead ends: 148 [2021-11-16 21:40:26,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:40:26,131 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:40:26,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 536 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:40:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-16 21:40:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2021-11-16 21:40:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.184782608695652) internal successors, (109), 94 states have internal predecessors, (109), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:40:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2021-11-16 21:40:26,141 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2021-11-16 21:40:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:40:26,142 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2021-11-16 21:40:26,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:40:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2021-11-16 21:40:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-16 21:40:26,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:40:26,144 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:40:26,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:40:26,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:40:26,355 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:40:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:40:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1467961933, now seen corresponding path program 1 times [2021-11-16 21:40:26,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:40:26,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701300492] [2021-11-16 21:40:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:26,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:40:26,391 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:40:26,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220651790] [2021-11-16 21:40:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:40:26,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:40:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:40:26,393 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) [2021-11-16 21:40:26,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 21:40:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:40:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-16 21:40:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:40:27,115 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 18 treesize of output 14 [2021-11-16 21:40:29,249 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|)) is different from true [2021-11-16 21:41:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-16 21:41:01,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:01,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:01,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701300492] [2021-11-16 21:41:01,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:01,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220651790] [2021-11-16 21:41:01,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220651790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:01,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:01,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-16 21:41:01,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636603325] [2021-11-16 21:41:01,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:01,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-16 21:41:01,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-16 21:41:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=191, Unknown=13, NotChecked=28, Total=272 [2021-11-16 21:41:01,919 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-16 21:41:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:19,880 INFO L93 Difference]: Finished difference Result 305 states and 405 transitions. [2021-11-16 21:41:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 21:41:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 142 [2021-11-16 21:41:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:19,883 INFO L225 Difference]: With dead ends: 305 [2021-11-16 21:41:19,883 INFO L226 Difference]: Without dead ends: 207 [2021-11-16 21:41:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=67, Invalid=336, Unknown=21, NotChecked=38, Total=462 [2021-11-16 21:41:19,884 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 133 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:19,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1295 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 718 Invalid, 0 Unknown, 623 Unchecked, 1.6s Time] [2021-11-16 21:41:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-16 21:41:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-11-16 21:41:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 95 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:41:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2021-11-16 21:41:19,906 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 142 [2021-11-16 21:41:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2021-11-16 21:41:19,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-16 21:41:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2021-11-16 21:41:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-16 21:41:19,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:19,911 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:19,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-16 21:41:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:20,112 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:20,113 INFO L85 PathProgramCache]: Analyzing trace with hash 940161605, now seen corresponding path program 1 times [2021-11-16 21:41:20,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:20,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675974011] [2021-11-16 21:41:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:20,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:20,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:20,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703895151] [2021-11-16 21:41:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:20,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:20,163 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) [2021-11-16 21:41:20,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 21:41:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:41:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:41:20,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:20,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:20,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675974011] [2021-11-16 21:41:20,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:20,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703895151] [2021-11-16 21:41:20,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703895151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:20,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:20,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:41:20,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544410295] [2021-11-16 21:41:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:20,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:41:20,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:41:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:41:20,833 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:41:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:21,527 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2021-11-16 21:41:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:41:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 144 [2021-11-16 21:41:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:21,531 INFO L225 Difference]: With dead ends: 250 [2021-11-16 21:41:21,531 INFO L226 Difference]: Without dead ends: 151 [2021-11-16 21:41:21,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:41:21,533 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 7 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:21,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 21:41:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-16 21:41:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-11-16 21:41:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 96 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:41:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2021-11-16 21:41:21,554 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2021-11-16 21:41:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:21,554 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2021-11-16 21:41:21,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:41:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2021-11-16 21:41:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-16 21:41:21,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:21,563 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:21,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:21,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:21,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1620219975, now seen corresponding path program 1 times [2021-11-16 21:41:21,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:21,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702053414] [2021-11-16 21:41:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:21,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:21,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:21,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093493595] [2021-11-16 21:41:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:21,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:21,823 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) [2021-11-16 21:41:21,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 21:41:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:41:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:41:22,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:22,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:22,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702053414] [2021-11-16 21:41:22,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:22,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093493595] [2021-11-16 21:41:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093493595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:22,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:22,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 21:41:22,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853333786] [2021-11-16 21:41:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:22,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:41:22,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:41:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:41:22,477 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-16 21:41:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:22,546 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2021-11-16 21:41:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:41:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 144 [2021-11-16 21:41:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:22,548 INFO L225 Difference]: With dead ends: 266 [2021-11-16 21:41:22,548 INFO L226 Difference]: Without dead ends: 147 [2021-11-16 21:41:22,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:41:22,550 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 13 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:22,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 870 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:41:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-16 21:41:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-16 21:41:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:41:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2021-11-16 21:41:22,560 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 144 [2021-11-16 21:41:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:22,560 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2021-11-16 21:41:22,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-16 21:41:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2021-11-16 21:41:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-16 21:41:22,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:22,562 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:22,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:22,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:22,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655420, now seen corresponding path program 1 times [2021-11-16 21:41:22,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:22,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493012208] [2021-11-16 21:41:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:22,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:22,820 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:22,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618891203] [2021-11-16 21:41:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:22,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:22,822 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) [2021-11-16 21:41:22,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 21:41:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-16 21:41:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:41:23,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:23,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:23,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493012208] [2021-11-16 21:41:23,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:23,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618891203] [2021-11-16 21:41:23,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618891203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:23,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 21:41:23,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197378914] [2021-11-16 21:41:23,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:23,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 21:41:23,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 21:41:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:41:23,490 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:41:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:23,507 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2021-11-16 21:41:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 21:41:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 145 [2021-11-16 21:41:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:23,510 INFO L225 Difference]: With dead ends: 268 [2021-11-16 21:41:23,510 INFO L226 Difference]: Without dead ends: 149 [2021-11-16 21:41:23,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 21:41:23,511 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 1 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:23,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 357 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:41:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-16 21:41:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-11-16 21:41:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.168421052631579) internal successors, (111), 97 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:41:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2021-11-16 21:41:23,521 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 145 [2021-11-16 21:41:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:23,522 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2021-11-16 21:41:23,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-16 21:41:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2021-11-16 21:41:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-16 21:41:23,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:23,524 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:23,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:23,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:23,740 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash -626640314, now seen corresponding path program 1 times [2021-11-16 21:41:23,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:23,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997998460] [2021-11-16 21:41:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:23,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:23,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:23,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719242234] [2021-11-16 21:41:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:23,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:23,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:23,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:23,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 21:41:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2373 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-16 21:41:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:41:24,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:41:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:41:25,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:25,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997998460] [2021-11-16 21:41:25,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:25,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719242234] [2021-11-16 21:41:25,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719242234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:41:25,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:41:25,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-16 21:41:25,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312257444] [2021-11-16 21:41:25,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:41:25,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 21:41:25,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 21:41:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:41:25,092 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-16 21:41:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:25,209 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2021-11-16 21:41:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:41:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 147 [2021-11-16 21:41:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:25,212 INFO L225 Difference]: With dead ends: 270 [2021-11-16 21:41:25,212 INFO L226 Difference]: Without dead ends: 151 [2021-11-16 21:41:25,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:41:25,213 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 25 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:25,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1212 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:41:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-16 21:41:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-16 21:41:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-11-16 21:41:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2021-11-16 21:41:25,222 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 147 [2021-11-16 21:41:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:25,222 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2021-11-16 21:41:25,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-16 21:41:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2021-11-16 21:41:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-16 21:41:25,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:25,224 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:25,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:25,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-16 21:41:25,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2092653112, now seen corresponding path program 2 times [2021-11-16 21:41:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040765198] [2021-11-16 21:41:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:25,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:25,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:25,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245586110] [2021-11-16 21:41:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:41:25,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:25,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:25,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:25,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 21:41:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:41:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:41:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-16 21:41:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:26,420 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 21:41:26,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-16 21:41:26,865 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-16 21:41:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 29 [2021-11-16 21:41:27,262 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-16 21:41:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2021-11-16 21:41:37,466 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-11-16 21:41:37,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 48 treesize of output 57 [2021-11-16 21:41:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 29 [2021-11-16 21:41:38,073 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 49 treesize of output 45 [2021-11-16 21:41:44,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:41:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 157 [2021-11-16 21:41:44,111 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 145 treesize of output 125 [2021-11-16 21:41:44,121 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 130 treesize of output 114 [2021-11-16 21:41:44,167 INFO L354 Elim1Store]: treesize reduction 88, result has 27.3 percent of original size [2021-11-16 21:41:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 134 [2021-11-16 21:41:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-16 21:41:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:41:46,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:46,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040765198] [2021-11-16 21:41:46,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:46,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245586110] [2021-11-16 21:41:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245586110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:41:46,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:41:46,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-11-16 21:41:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976115851] [2021-11-16 21:41:46,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:41:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 21:41:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 21:41:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2021-11-16 21:41:46,465 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 14 states have call successors, (24), 8 states have call predecessors, (24), 12 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 21:41:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:50,910 INFO L93 Difference]: Finished difference Result 249 states and 324 transitions. [2021-11-16 21:41:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-16 21:41:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 14 states have call successors, (24), 8 states have call predecessors, (24), 12 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) Word has length 149 [2021-11-16 21:41:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:50,912 INFO L225 Difference]: With dead ends: 249 [2021-11-16 21:41:50,912 INFO L226 Difference]: Without dead ends: 247 [2021-11-16 21:41:50,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 89 SyntacticMatches, 21 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=215, Invalid=2864, Unknown=1, NotChecked=0, Total=3080 [2021-11-16 21:41:50,914 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 203 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1802 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:50,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1670 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 839 Invalid, 0 Unknown, 1802 Unchecked, 1.6s Time] [2021-11-16 21:41:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-16 21:41:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 225. [2021-11-16 21:41:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 148 states have internal predecessors, (164), 57 states have call successors, (57), 19 states have call predecessors, (57), 22 states have return successors, (66), 57 states have call predecessors, (66), 56 states have call successors, (66) [2021-11-16 21:41:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 287 transitions. [2021-11-16 21:41:50,945 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 287 transitions. Word has length 149 [2021-11-16 21:41:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:50,947 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 287 transitions. [2021-11-16 21:41:50,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 14 states have call successors, (24), 8 states have call predecessors, (24), 12 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 21:41:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 287 transitions. [2021-11-16 21:41:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-16 21:41:50,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:50,950 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:50,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:51,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:51,163 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -45084850, now seen corresponding path program 1 times [2021-11-16 21:41:51,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:51,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352374945] [2021-11-16 21:41:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:51,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:51,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:51,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287879369] [2021-11-16 21:41:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:51,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:51,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 21:41:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-16 21:41:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-16 21:41:51,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:51,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:51,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352374945] [2021-11-16 21:41:51,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:51,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287879369] [2021-11-16 21:41:51,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287879369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:51,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:51,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 21:41:51,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981233708] [2021-11-16 21:41:51,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:51,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:41:51,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:41:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:41:51,946 INFO L87 Difference]: Start difference. First operand 225 states and 287 transitions. Second operand has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-16 21:41:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:52,320 INFO L93 Difference]: Finished difference Result 346 states and 437 transitions. [2021-11-16 21:41:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:41:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 155 [2021-11-16 21:41:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:52,322 INFO L225 Difference]: With dead ends: 346 [2021-11-16 21:41:52,322 INFO L226 Difference]: Without dead ends: 189 [2021-11-16 21:41:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:41:52,327 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 160 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:52,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1214 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:41:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-16 21:41:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-16 21:41:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.144) internal successors, (143), 128 states have internal predecessors, (143), 43 states have call successors, (43), 17 states have call predecessors, (43), 20 states have return successors, (50), 43 states have call predecessors, (50), 42 states have call successors, (50) [2021-11-16 21:41:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2021-11-16 21:41:52,340 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 155 [2021-11-16 21:41:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:52,341 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2021-11-16 21:41:52,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-16 21:41:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2021-11-16 21:41:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-16 21:41:52,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:52,344 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 21:41:52,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 21:41:52,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2008078094, now seen corresponding path program 2 times [2021-11-16 21:41:52,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:52,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989803440] [2021-11-16 21:41:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:52,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:52,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:52,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534468949] [2021-11-16 21:41:52,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:41:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:52,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:52,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 21:41:53,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:41:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:41:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-16 21:41:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-16 21:41:53,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:41:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989803440] [2021-11-16 21:41:53,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534468949] [2021-11-16 21:41:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534468949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:41:53,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:41:53,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 21:41:53,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586748968] [2021-11-16 21:41:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:41:53,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:41:53,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:41:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:41:53,729 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand has 10 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-16 21:41:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:53,874 INFO L93 Difference]: Finished difference Result 301 states and 374 transitions. [2021-11-16 21:41:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:41:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 155 [2021-11-16 21:41:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:53,876 INFO L225 Difference]: With dead ends: 301 [2021-11-16 21:41:53,876 INFO L226 Difference]: Without dead ends: 185 [2021-11-16 21:41:53,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:41:53,877 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:53,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1470 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:41:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-16 21:41:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-16 21:41:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 123 states have (on average 1.146341463414634) internal successors, (141), 126 states have internal predecessors, (141), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:41:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 228 transitions. [2021-11-16 21:41:53,889 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 228 transitions. Word has length 155 [2021-11-16 21:41:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 228 transitions. [2021-11-16 21:41:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-16 21:41:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 228 transitions. [2021-11-16 21:41:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-16 21:41:53,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:53,891 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:53,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-16 21:41:54,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-16 21:41:54,103 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1264090376, now seen corresponding path program 1 times [2021-11-16 21:41:54,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:54,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728750079] [2021-11-16 21:41:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:54,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:54,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:54,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161091964] [2021-11-16 21:41:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:54,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:54,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:54,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 21:41:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:41:54,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:41:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 198 proven. 4 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:41:54,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:41:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:41:55,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:41:55,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728750079] [2021-11-16 21:41:55,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:41:55,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161091964] [2021-11-16 21:41:55,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161091964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:41:55,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:41:55,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-16 21:41:55,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435979457] [2021-11-16 21:41:55,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:41:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 21:41:55,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:41:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 21:41:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:41:55,493 INFO L87 Difference]: Start difference. First operand 185 states and 228 transitions. Second operand has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-16 21:41:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:41:55,629 INFO L93 Difference]: Finished difference Result 338 states and 415 transitions. [2021-11-16 21:41:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:41:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 149 [2021-11-16 21:41:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:41:55,631 INFO L225 Difference]: With dead ends: 338 [2021-11-16 21:41:55,631 INFO L226 Difference]: Without dead ends: 188 [2021-11-16 21:41:55,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:41:55,632 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 29 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:41:55,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1561 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:41:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-16 21:41:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-11-16 21:41:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.144) internal successors, (143), 128 states have internal predecessors, (143), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:41:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 230 transitions. [2021-11-16 21:41:55,644 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 230 transitions. Word has length 149 [2021-11-16 21:41:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:41:55,644 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 230 transitions. [2021-11-16 21:41:55,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-16 21:41:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 230 transitions. [2021-11-16 21:41:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-16 21:41:55,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:41:55,646 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:41:55,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-16 21:41:55,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-16 21:41:55,867 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:41:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:41:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1175064586, now seen corresponding path program 2 times [2021-11-16 21:41:55,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:41:55,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677787858] [2021-11-16 21:41:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:41:55,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:41:55,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:41:55,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776975984] [2021-11-16 21:41:55,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:41:55,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:41:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:41:55,904 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:41:55,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 21:41:56,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:41:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:41:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-16 21:41:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:41:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:41:57,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-11-16 21:42:05,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:42:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 74 [2021-11-16 21:42:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 17 proven. 75 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-16 21:42:05,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:42:09,625 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_aws_mul_size_checked_#in~r#1.base_29| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_41| Int)) (let ((.cse0 (* |v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_41| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|) (+ 16 |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset|))))) (<= (mod .cse0 18446744073709551616) (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_29| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_29|) 0 .cse0)) |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset| 8)) 18446744073709551616)))) (forall ((|v_aws_mul_size_checked_#in~r#1.base_29| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_41| Int)) (let ((.cse2 (* |v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_41| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|) (+ 16 |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset|))))) (let ((.cse1 (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_29| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_29|) 0 .cse2)) |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|))) (or (not (= (mod (select .cse1 (+ |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset| 24)) 18446744073709551616) 0)) (< (mod (select .cse1 (+ |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset| 8)) 18446744073709551616) (mod .cse2 18446744073709551616))))))) is different from false [2021-11-16 21:42:09,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:09,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677787858] [2021-11-16 21:42:09,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:09,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776975984] [2021-11-16 21:42:09,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776975984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:42:09,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:42:09,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-16 21:42:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550619129] [2021-11-16 21:42:09,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-16 21:42:09,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 21:42:09,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 21:42:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=856, Unknown=3, NotChecked=58, Total=992 [2021-11-16 21:42:09,651 INFO L87 Difference]: Start difference. First operand 187 states and 230 transitions. Second operand has 28 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-16 21:42:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:42:12,929 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2021-11-16 21:42:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 21:42:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 151 [2021-11-16 21:42:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:42:12,932 INFO L225 Difference]: With dead ends: 230 [2021-11-16 21:42:12,932 INFO L226 Difference]: Without dead ends: 228 [2021-11-16 21:42:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=138, Invalid=1669, Unknown=3, NotChecked=82, Total=1892 [2021-11-16 21:42:12,934 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 123 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:42:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2151 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1413 Invalid, 0 Unknown, 830 Unchecked, 2.4s Time] [2021-11-16 21:42:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-16 21:42:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 190. [2021-11-16 21:42:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 128 states have (on average 1.15625) internal successors, (148), 131 states have internal predecessors, (148), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:42:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2021-11-16 21:42:12,946 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 151 [2021-11-16 21:42:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:42:12,947 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2021-11-16 21:42:12,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-16 21:42:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2021-11-16 21:42:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-16 21:42:12,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:42:12,948 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:42:12,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 21:42:13,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 21:42:13,163 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:42:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:42:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1855122956, now seen corresponding path program 1 times [2021-11-16 21:42:13,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:42:13,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093310226] [2021-11-16 21:42:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:13,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:42:13,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:42:13,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013375184] [2021-11-16 21:42:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:13,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:42:13,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:42:13,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 21:42:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:42:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2392 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 21:42:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:42:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-16 21:42:13,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:42:13,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:13,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093310226] [2021-11-16 21:42:13,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:13,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013375184] [2021-11-16 21:42:13,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013375184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:42:13,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:42:13,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 21:42:13,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184766153] [2021-11-16 21:42:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:42:13,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:42:13,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:42:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:42:13,787 INFO L87 Difference]: Start difference. First operand 190 states and 235 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:42:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:42:15,065 INFO L93 Difference]: Finished difference Result 315 states and 398 transitions. [2021-11-16 21:42:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:42:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 151 [2021-11-16 21:42:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:42:15,068 INFO L225 Difference]: With dead ends: 315 [2021-11-16 21:42:15,068 INFO L226 Difference]: Without dead ends: 200 [2021-11-16 21:42:15,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:42:15,069 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 13 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:42:15,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 668 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-16 21:42:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-16 21:42:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 190. [2021-11-16 21:42:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 128 states have (on average 1.140625) internal successors, (146), 131 states have internal predecessors, (146), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:42:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 233 transitions. [2021-11-16 21:42:15,113 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 233 transitions. Word has length 151 [2021-11-16 21:42:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:42:15,113 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 233 transitions. [2021-11-16 21:42:15,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-16 21:42:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 233 transitions. [2021-11-16 21:42:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-16 21:42:15,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:42:15,116 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:42:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 21:42:15,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:15,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:42:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:42:15,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1806751856, now seen corresponding path program 3 times [2021-11-16 21:42:15,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:42:15,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050084471] [2021-11-16 21:42:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:15,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:42:15,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:42:15,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277580360] [2021-11-16 21:42:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:42:15,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:42:15,353 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:42:15,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 21:42:26,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-16 21:42:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:42:26,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:42:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:42:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 198 proven. 9 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:42:26,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:42:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:42:27,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:27,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050084471] [2021-11-16 21:42:27,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:27,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277580360] [2021-11-16 21:42:27,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277580360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:42:27,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:42:27,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-16 21:42:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146885160] [2021-11-16 21:42:27,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:42:27,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-16 21:42:27,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-16 21:42:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:42:27,209 INFO L87 Difference]: Start difference. First operand 190 states and 233 transitions. Second operand has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:42:27,392 INFO L93 Difference]: Finished difference Result 346 states and 423 transitions. [2021-11-16 21:42:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:42:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 157 [2021-11-16 21:42:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:42:27,394 INFO L225 Difference]: With dead ends: 346 [2021-11-16 21:42:27,394 INFO L226 Difference]: Without dead ends: 193 [2021-11-16 21:42:27,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-16 21:42:27,395 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 49 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:42:27,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1566 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:42:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-16 21:42:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-11-16 21:42:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 133 states have internal predecessors, (148), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:42:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2021-11-16 21:42:27,405 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 157 [2021-11-16 21:42:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:42:27,406 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2021-11-16 21:42:27,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2021-11-16 21:42:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-16 21:42:27,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:42:27,407 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:42:27,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 21:42:27,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-16 21:42:27,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:42:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:42:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1035560814, now seen corresponding path program 4 times [2021-11-16 21:42:27,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:42:27,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800299083] [2021-11-16 21:42:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:27,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:42:27,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:42:27,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937296096] [2021-11-16 21:42:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:42:27,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:27,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:42:27,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:42:27,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 21:42:28,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:42:28,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:42:28,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2410 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 21:42:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:42:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 198 proven. 16 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:42:28,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:42:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:42:29,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:29,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800299083] [2021-11-16 21:42:29,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:29,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937296096] [2021-11-16 21:42:29,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937296096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:42:29,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:42:29,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-16 21:42:29,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749322437] [2021-11-16 21:42:29,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:42:29,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 21:42:29,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 21:42:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:42:29,014 INFO L87 Difference]: Start difference. First operand 192 states and 235 transitions. Second operand has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:42:29,207 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2021-11-16 21:42:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:42:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 159 [2021-11-16 21:42:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:42:29,209 INFO L225 Difference]: With dead ends: 348 [2021-11-16 21:42:29,209 INFO L226 Difference]: Without dead ends: 195 [2021-11-16 21:42:29,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:42:29,210 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 37 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:42:29,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2082 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:42:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-16 21:42:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-11-16 21:42:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 135 states have internal predecessors, (150), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:42:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 237 transitions. [2021-11-16 21:42:29,221 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 237 transitions. Word has length 159 [2021-11-16 21:42:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:42:29,221 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 237 transitions. [2021-11-16 21:42:29,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 237 transitions. [2021-11-16 21:42:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-16 21:42:29,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:42:29,223 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:42:29,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-16 21:42:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-16 21:42:29,439 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:42:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:42:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1344655636, now seen corresponding path program 5 times [2021-11-16 21:42:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:42:29,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838805480] [2021-11-16 21:42:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:29,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:42:29,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:42:29,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728720006] [2021-11-16 21:42:29,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:42:29,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:29,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:42:29,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:42:29,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 21:42:30,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-16 21:42:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:42:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-16 21:42:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:42:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 198 proven. 25 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:42:30,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:42:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:42:32,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:42:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838805480] [2021-11-16 21:42:32,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:42:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728720006] [2021-11-16 21:42:32,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728720006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:42:32,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:42:32,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-16 21:42:32,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125607735] [2021-11-16 21:42:32,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:42:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:42:32,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:42:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:42:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-11-16 21:42:32,036 INFO L87 Difference]: Start difference. First operand 194 states and 237 transitions. Second operand has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 31 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:42:33,667 INFO L93 Difference]: Finished difference Result 350 states and 427 transitions. [2021-11-16 21:42:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 21:42:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 31 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 161 [2021-11-16 21:42:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:42:33,669 INFO L225 Difference]: With dead ends: 350 [2021-11-16 21:42:33,669 INFO L226 Difference]: Without dead ends: 197 [2021-11-16 21:42:33,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 21:42:33,671 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 67 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:42:33,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2261 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:42:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-16 21:42:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-11-16 21:42:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 137 states have internal predecessors, (152), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:42:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-11-16 21:42:33,682 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 161 [2021-11-16 21:42:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:42:33,682 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-11-16 21:42:33,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 31 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:42:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-11-16 21:42:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-16 21:42:33,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:42:33,684 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:42:33,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-16 21:42:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-16 21:42:33,891 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:42:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:42:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash -484904682, now seen corresponding path program 6 times [2021-11-16 21:42:33,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:42:33,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760194498] [2021-11-16 21:42:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:42:33,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:42:33,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:42:33,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975047774] [2021-11-16 21:42:33,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-16 21:42:33,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:42:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:42:33,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:42:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 21:44:35,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-16 21:44:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:44:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 21:44:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:44:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 198 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:44:36,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:44:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:44:36,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:44:36,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760194498] [2021-11-16 21:44:36,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:44:36,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975047774] [2021-11-16 21:44:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975047774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:44:36,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:44:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-16 21:44:36,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093643685] [2021-11-16 21:44:36,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:44:36,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 21:44:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:44:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 21:44:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:44:36,769 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:44:37,069 INFO L93 Difference]: Finished difference Result 352 states and 429 transitions. [2021-11-16 21:44:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 21:44:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 163 [2021-11-16 21:44:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:44:37,071 INFO L225 Difference]: With dead ends: 352 [2021-11-16 21:44:37,071 INFO L226 Difference]: Without dead ends: 199 [2021-11-16 21:44:37,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-11-16 21:44:37,073 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 48 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:44:37,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 2089 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:44:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-16 21:44:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-11-16 21:44:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 139 states have internal predecessors, (154), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:44:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2021-11-16 21:44:37,084 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 163 [2021-11-16 21:44:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:44:37,084 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2021-11-16 21:44:37,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2021-11-16 21:44:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-16 21:44:37,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:44:37,085 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:44:37,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 21:44:37,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 21:44:37,300 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:44:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:44:37,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746216, now seen corresponding path program 7 times [2021-11-16 21:44:37,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:44:37,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630018576] [2021-11-16 21:44:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:44:37,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:44:37,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:44:37,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144103232] [2021-11-16 21:44:37,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-16 21:44:37,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:44:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:44:37,332 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:44:37,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 21:44:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:44:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-16 21:44:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:44:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 198 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:44:38,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:44:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:44:39,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:44:39,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630018576] [2021-11-16 21:44:39,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:44:39,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144103232] [2021-11-16 21:44:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144103232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:44:39,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:44:39,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-16 21:44:39,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688940342] [2021-11-16 21:44:39,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:44:39,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:44:39,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:44:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:44:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:44:39,257 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 27 states, 25 states have (on average 4.32) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:44:39,795 INFO L93 Difference]: Finished difference Result 354 states and 431 transitions. [2021-11-16 21:44:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 21:44:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.32) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 165 [2021-11-16 21:44:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:44:39,798 INFO L225 Difference]: With dead ends: 354 [2021-11-16 21:44:39,798 INFO L226 Difference]: Without dead ends: 201 [2021-11-16 21:44:39,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-11-16 21:44:39,799 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 57 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:44:39,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 2434 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:44:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-16 21:44:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-16 21:44:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 141 states have internal predecessors, (156), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:44:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 243 transitions. [2021-11-16 21:44:39,810 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 243 transitions. Word has length 165 [2021-11-16 21:44:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:44:39,810 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 243 transitions. [2021-11-16 21:44:39,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.32) internal successors, (108), 27 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 243 transitions. [2021-11-16 21:44:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-16 21:44:39,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:44:39,812 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:44:39,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 21:44:40,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:44:40,028 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:44:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:44:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash 709060506, now seen corresponding path program 8 times [2021-11-16 21:44:40,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:44:40,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134914048] [2021-11-16 21:44:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:44:40,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:44:40,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:44:40,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577405191] [2021-11-16 21:44:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:44:40,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:44:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:44:40,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:44:40,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 21:44:46,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:44:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:44:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-16 21:44:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:44:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 198 proven. 64 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:44:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:44:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:44:47,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:44:47,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134914048] [2021-11-16 21:44:47,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:44:47,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577405191] [2021-11-16 21:44:47,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577405191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:44:47,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:44:47,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-16 21:44:47,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720344908] [2021-11-16 21:44:47,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:44:47,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:44:47,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:44:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:44:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:44:47,655 INFO L87 Difference]: Start difference. First operand 200 states and 243 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:44:48,012 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2021-11-16 21:44:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 21:44:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 167 [2021-11-16 21:44:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:44:48,015 INFO L225 Difference]: With dead ends: 356 [2021-11-16 21:44:48,015 INFO L226 Difference]: Without dead ends: 203 [2021-11-16 21:44:48,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:44:48,017 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 70 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:44:48,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2439 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:44:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-16 21:44:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-11-16 21:44:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 143 states have internal predecessors, (158), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:44:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 245 transitions. [2021-11-16 21:44:48,028 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 245 transitions. Word has length 167 [2021-11-16 21:44:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:44:48,028 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 245 transitions. [2021-11-16 21:44:48,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:44:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 245 transitions. [2021-11-16 21:44:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-16 21:44:48,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:44:48,030 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:44:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 21:44:48,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:44:48,255 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:44:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:44:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1406468580, now seen corresponding path program 9 times [2021-11-16 21:44:48,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:44:48,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728138139] [2021-11-16 21:44:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:44:48,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:44:48,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:44:48,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885809431] [2021-11-16 21:44:48,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:44:48,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:44:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:44:48,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:44:48,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 21:53:01,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-16 21:53:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:53:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-16 21:53:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:53:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 198 proven. 81 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:53:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:53:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:53:03,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:53:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728138139] [2021-11-16 21:53:03,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:53:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885809431] [2021-11-16 21:53:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885809431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:53:03,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:53:03,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-11-16 21:53:03,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860455213] [2021-11-16 21:53:03,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:53:03,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-16 21:53:03,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:53:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-16 21:53:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-11-16 21:53:03,665 INFO L87 Difference]: Start difference. First operand 202 states and 245 transitions. Second operand has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:53:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:53:04,143 INFO L93 Difference]: Finished difference Result 358 states and 435 transitions. [2021-11-16 21:53:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-16 21:53:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2021-11-16 21:53:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:53:04,146 INFO L225 Difference]: With dead ends: 358 [2021-11-16 21:53:04,146 INFO L226 Difference]: Without dead ends: 205 [2021-11-16 21:53:04,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-11-16 21:53:04,148 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 71 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:53:04,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 2614 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:53:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-16 21:53:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-11-16 21:53:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 145 states have internal predecessors, (160), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:53:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 247 transitions. [2021-11-16 21:53:04,158 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 247 transitions. Word has length 169 [2021-11-16 21:53:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:53:04,159 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 247 transitions. [2021-11-16 21:53:04,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:53:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 247 transitions. [2021-11-16 21:53:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-16 21:53:04,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:53:04,160 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:53:04,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-16 21:53:04,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:53:04,383 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:53:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:53:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1384578078, now seen corresponding path program 10 times [2021-11-16 21:53:04,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:53:04,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382717933] [2021-11-16 21:53:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:53:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:53:04,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:53:04,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313809957] [2021-11-16 21:53:04,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:53:04,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:53:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:53:04,418 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:53:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 21:53:05,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:53:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:53:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2452 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-16 21:53:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:53:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 198 proven. 100 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-16 21:53:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:53:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-16 21:53:06,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:53:06,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382717933] [2021-11-16 21:53:06,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 21:53:06,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313809957] [2021-11-16 21:53:06,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313809957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:53:06,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:53:06,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-16 21:53:06,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423026879] [2021-11-16 21:53:06,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:53:06,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:53:06,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:53:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:53:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-11-16 21:53:06,784 INFO L87 Difference]: Start difference. First operand 204 states and 247 transitions. Second operand has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:53:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:53:07,247 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2021-11-16 21:53:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 21:53:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 171 [2021-11-16 21:53:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:53:07,255 INFO L225 Difference]: With dead ends: 360 [2021-11-16 21:53:07,255 INFO L226 Difference]: Without dead ends: 207 [2021-11-16 21:53:07,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 21:53:07,257 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 68 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3135 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:53:07,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 3135 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:53:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-16 21:53:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2021-11-16 21:53:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.125) internal successors, (162), 147 states have internal predecessors, (162), 41 states have call successors, (41), 17 states have call predecessors, (41), 20 states have return successors, (46), 41 states have call predecessors, (46), 40 states have call successors, (46) [2021-11-16 21:53:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 249 transitions. [2021-11-16 21:53:07,268 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 249 transitions. Word has length 171 [2021-11-16 21:53:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:53:07,268 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 249 transitions. [2021-11-16 21:53:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-16 21:53:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 249 transitions. [2021-11-16 21:53:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-16 21:53:07,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:53:07,270 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:53:07,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 21:53:07,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:53:07,483 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:53:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:53:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -774143584, now seen corresponding path program 11 times [2021-11-16 21:53:07,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:53:07,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759338737] [2021-11-16 21:53:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:53:07,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:53:07,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 21:53:07,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985088870] [2021-11-16 21:53:07,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:53:07,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:53:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:53:07,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:53:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process Killed by 15