./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_array_list_set_at_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 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:54:20,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:54:20,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:54:20,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:54:20,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:54:20,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:54:20,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:54:20,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:54:20,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:54:20,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:54:20,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:54:20,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:54:20,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:54:20,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:54:20,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:54:20,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:54:20,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:54:20,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:54:20,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:54:20,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:54:20,241 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:54:20,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:54:20,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:54:20,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:54:20,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:54:20,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:54:20,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:54:20,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:54:20,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:54:20,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:54:20,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:54:20,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:54:20,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:54:20,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:54:20,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:54:20,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:54:20,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:54:20,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:54:20,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:54:20,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:54:20,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:54:20,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:54:20,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 21:54:20,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:54:20,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:54:20,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:54:20,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:54:20,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:54:20,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:54:20,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:54:20,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:54:20,285 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:54:20,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:54:20,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:54:20,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:54:20,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:54:20,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:54:20,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:54:20,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:54:20,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:54:20,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:54:20,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed [2022-07-19 21:54:20,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:54:20,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:54:20,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:54:20,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:54:20,495 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:54:20,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2022-07-19 21:54:20,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5441e007/e744ef68e31342128f4d1235b2dcf4f2/FLAGd02ec82e2 [2022-07-19 21:54:21,155 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:54:21,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2022-07-19 21:54:21,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5441e007/e744ef68e31342128f4d1235b2dcf4f2/FLAGd02ec82e2 [2022-07-19 21:54:21,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5441e007/e744ef68e31342128f4d1235b2dcf4f2 [2022-07-19 21:54:21,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:54:21,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:54:21,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:54:21,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:54:21,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:54:21,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:54:21" (1/1) ... [2022-07-19 21:54:21,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733b3062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:21, skipping insertion in model container [2022-07-19 21:54:21,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:54:21" (1/1) ... [2022-07-19 21:54:21,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:54:21,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:54:21,828 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_array_list_set_at_harness.i[4495,4508] [2022-07-19 21:54:21,833 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_array_list_set_at_harness.i[4555,4568] [2022-07-19 21:54:22,233 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 21:54:22,310 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,311 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,311 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,313 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,314 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,330 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,331 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,332 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,332 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,333 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,334 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,335 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,335 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,519 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 21:54:22,520 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 21:54:22,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 21:54:22,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 21:54:22,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 21:54:22,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 21:54:22,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 21:54:22,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 21:54:22,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 21:54:22,531 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 21:54:22,605 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,617 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,646 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,647 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,647 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:54:22,711 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:54:22,719 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_array_list_set_at_harness.i[4495,4508] [2022-07-19 21:54:22,730 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_array_list_set_at_harness.i[4555,4568] [2022-07-19 21:54:22,769 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 21:54:22,785 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,788 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,788 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,789 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,789 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,795 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,795 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,799 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,799 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,800 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,800 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,801 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,802 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,825 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 21:54:22,826 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 21:54:22,827 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 21:54:22,828 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 21:54:22,828 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 21:54:22,828 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 21:54:22,829 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 21:54:22,829 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 21:54:22,829 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 21:54:22,830 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 21:54:22,855 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,858 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,879 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,883 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,884 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 21:54:22,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:54:23,024 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:54:23,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23 WrapperNode [2022-07-19 21:54:23,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:54:23,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:54:23,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:54:23,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:54:23,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,192 INFO L137 Inliner]: procedures = 691, calls = 1681, calls flagged for inlining = 51, calls inlined = 11, statements flattened = 847 [2022-07-19 21:54:23,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:54:23,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:54:23,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:54:23,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:54:23,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:54:23,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:54:23,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:54:23,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:54:23,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (1/1) ... [2022-07-19 21:54:23,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:54:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:23,342 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) [2022-07-19 21:54:23,376 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 [2022-07-19 21:54:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:54:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-07-19 21:54:23,394 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-07-19 21:54:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-19 21:54:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-19 21:54:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-19 21:54:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-19 21:54:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-07-19 21:54:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-07-19 21:54:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:54:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-19 21:54:23,396 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-19 21:54:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 21:54:23,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 21:54:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:54:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:54:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:54:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-07-19 21:54:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-07-19 21:54:23,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:54:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:54:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-19 21:54:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-19 21:54:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-07-19 21:54:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-07-19 21:54:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-19 21:54:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-19 21:54:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-07-19 21:54:23,399 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-07-19 21:54:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-19 21:54:23,399 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-19 21:54:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2022-07-19 21:54:23,399 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2022-07-19 21:54:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 21:54:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 21:54:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-07-19 21:54:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-07-19 21:54:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-07-19 21:54:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-07-19 21:54:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:54:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-07-19 21:54:23,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-07-19 21:54:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:54:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 21:54:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-19 21:54:23,401 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-19 21:54:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-19 21:54:23,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-19 21:54:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-07-19 21:54:23,402 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-07-19 21:54:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:54:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-07-19 21:54:23,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-07-19 21:54:23,402 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_set_at [2022-07-19 21:54:23,403 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_set_at [2022-07-19 21:54:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:54:23,639 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:54:23,641 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:54:24,325 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:54:24,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:54:24,339 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 21:54:24,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:54:24 BoogieIcfgContainer [2022-07-19 21:54:24,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:54:24,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:54:24,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:54:24,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:54:24,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:54:21" (1/3) ... [2022-07-19 21:54:24,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6f0f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:54:24, skipping insertion in model container [2022-07-19 21:54:24,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:54:23" (2/3) ... [2022-07-19 21:54:24,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6f0f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:54:24, skipping insertion in model container [2022-07-19 21:54:24,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:54:24" (3/3) ... [2022-07-19 21:54:24,351 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_set_at_harness.i [2022-07-19 21:54:24,360 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:54:24,361 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:54:24,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:54:24,422 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5839215c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ed4d115 [2022-07-19 21:54:24,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 21:54:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-07-19 21:54:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-19 21:54:24,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:24,445 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:24,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1870768140, now seen corresponding path program 1 times [2022-07-19 21:54:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:24,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394037903] [2022-07-19 21:54:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:24,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:24,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 21:54:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:24,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 21:54:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 21:54:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 21:54:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 21:54:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 21:54:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 21:54:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 21:54:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 21:54:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 21:54:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:54:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 21:54:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 21:54:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 21:54:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 21:54:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-19 21:54:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-19 21:54:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 21:54:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-19 21:54:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 21:54:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 21:54:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-19 21:54:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 21:54:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-19 21:54:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-07-19 21:54:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:25,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394037903] [2022-07-19 21:54:25,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394037903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:54:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679907600] [2022-07-19 21:54:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:25,247 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) [2022-07-19 21:54:25,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:54:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 21:54:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-19 21:54:25,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679907600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:54:25,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-07-19 21:54:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71776874] [2022-07-19 21:54:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:54:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:54:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:54:25,811 INFO L87 Difference]: Start difference. First operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-07-19 21:54:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:26,073 INFO L93 Difference]: Finished difference Result 557 states and 840 transitions. [2022-07-19 21:54:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:54:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 146 [2022-07-19 21:54:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:26,084 INFO L225 Difference]: With dead ends: 557 [2022-07-19 21:54:26,084 INFO L226 Difference]: Without dead ends: 278 [2022-07-19 21:54:26,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:54:26,090 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 385 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:26,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1217 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 21:54:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-19 21:54:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-07-19 21:54:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 163 states have internal predecessors, (195), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2022-07-19 21:54:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 396 transitions. [2022-07-19 21:54:26,138 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 396 transitions. Word has length 146 [2022-07-19 21:54:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:26,139 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 396 transitions. [2022-07-19 21:54:26,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-07-19 21:54:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 396 transitions. [2022-07-19 21:54:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-19 21:54:26,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:26,142 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:26,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:26,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 21:54:26,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 265363754, now seen corresponding path program 1 times [2022-07-19 21:54:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629119489] [2022-07-19 21:54:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:26,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671028597] [2022-07-19 21:54:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:26,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:26,440 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) [2022-07-19 21:54:26,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:54:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:54:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-19 21:54:26,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629119489] [2022-07-19 21:54:26,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671028597] [2022-07-19 21:54:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671028597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:26,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:26,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:54:26,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893948] [2022-07-19 21:54:26,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:26,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:54:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:54:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:54:26,850 INFO L87 Difference]: Start difference. First operand 278 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-07-19 21:54:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:26,880 INFO L93 Difference]: Finished difference Result 535 states and 784 transitions. [2022-07-19 21:54:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:54:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 176 [2022-07-19 21:54:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:26,883 INFO L225 Difference]: With dead ends: 535 [2022-07-19 21:54:26,883 INFO L226 Difference]: Without dead ends: 283 [2022-07-19 21:54:26,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:54:26,885 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 10 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1124 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 [2022-07-19 21:54:26,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1124 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 21:54:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-19 21:54:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2022-07-19 21:54:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2022-07-19 21:54:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 398 transitions. [2022-07-19 21:54:26,906 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 398 transitions. Word has length 176 [2022-07-19 21:54:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:26,906 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 398 transitions. [2022-07-19 21:54:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-07-19 21:54:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 398 transitions. [2022-07-19 21:54:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-19 21:54:26,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:26,910 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:26,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:27,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 21:54:27,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1664860694, now seen corresponding path program 1 times [2022-07-19 21:54:27,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:27,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843142234] [2022-07-19 21:54:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:27,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:27,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431948739] [2022-07-19 21:54:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:27,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:27,215 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) [2022-07-19 21:54:27,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:54:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:54:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-19 21:54:27,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843142234] [2022-07-19 21:54:27,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431948739] [2022-07-19 21:54:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431948739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:27,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:27,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:54:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187661937] [2022-07-19 21:54:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:27,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:54:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:54:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:54:27,776 INFO L87 Difference]: Start difference. First operand 280 states and 398 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2022-07-19 21:54:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:28,167 INFO L93 Difference]: Finished difference Result 512 states and 726 transitions. [2022-07-19 21:54:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:54:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 176 [2022-07-19 21:54:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:28,170 INFO L225 Difference]: With dead ends: 512 [2022-07-19 21:54:28,170 INFO L226 Difference]: Without dead ends: 280 [2022-07-19 21:54:28,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:54:28,172 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 444 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:28,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1529 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 21:54:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-19 21:54:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-07-19 21:54:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (104), 92 states have call predecessors, (104), 92 states have call successors, (104) [2022-07-19 21:54:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 394 transitions. [2022-07-19 21:54:28,191 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 394 transitions. Word has length 176 [2022-07-19 21:54:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:28,193 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 394 transitions. [2022-07-19 21:54:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2022-07-19 21:54:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 394 transitions. [2022-07-19 21:54:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-19 21:54:28,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:28,195 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:28,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:28,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -331838195, now seen corresponding path program 2 times [2022-07-19 21:54:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864479163] [2022-07-19 21:54:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:28,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294257956] [2022-07-19 21:54:28,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:54:28,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:28,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:28,479 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) [2022-07-19 21:54:28,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:54:28,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:54:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:54:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:54:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-19 21:54:28,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864479163] [2022-07-19 21:54:28,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294257956] [2022-07-19 21:54:28,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294257956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:28,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:28,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:54:28,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966874032] [2022-07-19 21:54:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:28,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:54:28,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:54:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:54:28,887 INFO L87 Difference]: Start difference. First operand 280 states and 394 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-19 21:54:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:28,917 INFO L93 Difference]: Finished difference Result 494 states and 684 transitions. [2022-07-19 21:54:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:54:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 191 [2022-07-19 21:54:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:28,920 INFO L225 Difference]: With dead ends: 494 [2022-07-19 21:54:28,920 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 21:54:28,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:54:28,922 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 2 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:28,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 21:54:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 21:54:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-19 21:54:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (106), 93 states have call predecessors, (106), 92 states have call successors, (106) [2022-07-19 21:54:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 400 transitions. [2022-07-19 21:54:28,934 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 400 transitions. Word has length 191 [2022-07-19 21:54:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:28,935 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 400 transitions. [2022-07-19 21:54:28,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-19 21:54:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 400 transitions. [2022-07-19 21:54:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-19 21:54:28,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:28,937 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:28,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:29,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:29,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1595114899, now seen corresponding path program 1 times [2022-07-19 21:54:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:29,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675316544] [2022-07-19 21:54:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:29,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:29,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:29,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121271559] [2022-07-19 21:54:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:29,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:29,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:29,234 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) [2022-07-19 21:54:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:54:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:54:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-07-19 21:54:29,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675316544] [2022-07-19 21:54:29,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121271559] [2022-07-19 21:54:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121271559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:29,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:29,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:54:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850476447] [2022-07-19 21:54:29,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:29,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:54:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:54:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:54:29,715 INFO L87 Difference]: Start difference. First operand 285 states and 400 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-19 21:54:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:30,201 INFO L93 Difference]: Finished difference Result 516 states and 720 transitions. [2022-07-19 21:54:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:54:30,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) Word has length 197 [2022-07-19 21:54:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:30,203 INFO L225 Difference]: With dead ends: 516 [2022-07-19 21:54:30,203 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 21:54:30,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:54:30,205 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 494 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:30,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1700 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 21:54:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 21:54:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-19 21:54:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (100), 93 states have call predecessors, (100), 92 states have call successors, (100) [2022-07-19 21:54:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 394 transitions. [2022-07-19 21:54:30,217 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 394 transitions. Word has length 197 [2022-07-19 21:54:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:30,217 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 394 transitions. [2022-07-19 21:54:30,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-19 21:54:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 394 transitions. [2022-07-19 21:54:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-19 21:54:30,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:30,219 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:30,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:30,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:30,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash -895724094, now seen corresponding path program 2 times [2022-07-19 21:54:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:30,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745992836] [2022-07-19 21:54:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:30,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638563277] [2022-07-19 21:54:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:54:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:30,504 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) [2022-07-19 21:54:30,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:54:31,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:54:31,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:54:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:54:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-07-19 21:54:31,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745992836] [2022-07-19 21:54:31,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638563277] [2022-07-19 21:54:31,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638563277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:31,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:31,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 21:54:31,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381754825] [2022-07-19 21:54:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:31,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:54:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:54:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:54:31,130 INFO L87 Difference]: Start difference. First operand 285 states and 394 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-19 21:54:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:31,644 INFO L93 Difference]: Finished difference Result 513 states and 703 transitions. [2022-07-19 21:54:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:54:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 212 [2022-07-19 21:54:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:31,647 INFO L225 Difference]: With dead ends: 513 [2022-07-19 21:54:31,647 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 21:54:31,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:54:31,648 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 542 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:31,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1901 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 21:54:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 21:54:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-07-19 21:54:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (96), 93 states have call predecessors, (96), 92 states have call successors, (96) [2022-07-19 21:54:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 390 transitions. [2022-07-19 21:54:31,662 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 390 transitions. Word has length 212 [2022-07-19 21:54:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 390 transitions. [2022-07-19 21:54:31,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-19 21:54:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 390 transitions. [2022-07-19 21:54:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-19 21:54:31,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:31,665 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:31,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:31,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash 247081526, now seen corresponding path program 1 times [2022-07-19 21:54:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168511048] [2022-07-19 21:54:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:31,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107818578] [2022-07-19 21:54:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:31,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:31,963 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) [2022-07-19 21:54:31,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:54:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 21:54:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-19 21:54:32,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:32,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:32,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168511048] [2022-07-19 21:54:32,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:32,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107818578] [2022-07-19 21:54:32,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107818578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:32,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:32,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 21:54:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010299987] [2022-07-19 21:54:32,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:54:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:54:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:54:32,555 INFO L87 Difference]: Start difference. First operand 285 states and 390 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-07-19 21:54:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:32,689 INFO L93 Difference]: Finished difference Result 646 states and 908 transitions. [2022-07-19 21:54:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:54:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2022-07-19 21:54:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:32,692 INFO L225 Difference]: With dead ends: 646 [2022-07-19 21:54:32,692 INFO L226 Difference]: Without dead ends: 412 [2022-07-19 21:54:32,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:54:32,693 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 133 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:32,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 3317 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 21:54:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-07-19 21:54:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2022-07-19 21:54:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 225 states have internal predecessors, (271), 138 states have call successors, (138), 23 states have call predecessors, (138), 26 states have return successors, (145), 139 states have call predecessors, (145), 137 states have call successors, (145) [2022-07-19 21:54:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 554 transitions. [2022-07-19 21:54:32,710 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 554 transitions. Word has length 242 [2022-07-19 21:54:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:32,710 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 554 transitions. [2022-07-19 21:54:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-07-19 21:54:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 554 transitions. [2022-07-19 21:54:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-19 21:54:32,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:32,712 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:32,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:32,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:32,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1060060872, now seen corresponding path program 1 times [2022-07-19 21:54:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539680872] [2022-07-19 21:54:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:33,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:33,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123311452] [2022-07-19 21:54:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:33,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:33,005 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) [2022-07-19 21:54:33,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:54:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:33,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:54:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-19 21:54:33,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:33,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539680872] [2022-07-19 21:54:33,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:33,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123311452] [2022-07-19 21:54:33,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123311452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:33,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:33,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:54:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434189153] [2022-07-19 21:54:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:54:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:54:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:54:33,622 INFO L87 Difference]: Start difference. First operand 388 states and 554 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2022-07-19 21:54:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:33,802 INFO L93 Difference]: Finished difference Result 827 states and 1198 transitions. [2022-07-19 21:54:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:54:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2022-07-19 21:54:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:33,805 INFO L225 Difference]: With dead ends: 827 [2022-07-19 21:54:33,805 INFO L226 Difference]: Without dead ends: 500 [2022-07-19 21:54:33,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:54:33,807 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 127 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:33,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2973 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 21:54:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-07-19 21:54:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 478. [2022-07-19 21:54:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 270 states have (on average 1.2185185185185186) internal successors, (329), 272 states have internal predecessors, (329), 180 states have call successors, (180), 24 states have call predecessors, (180), 27 states have return successors, (189), 181 states have call predecessors, (189), 179 states have call successors, (189) [2022-07-19 21:54:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 698 transitions. [2022-07-19 21:54:33,828 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 698 transitions. Word has length 242 [2022-07-19 21:54:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:33,829 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 698 transitions. [2022-07-19 21:54:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2022-07-19 21:54:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 698 transitions. [2022-07-19 21:54:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-19 21:54:33,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:33,831 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:33,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:54:34,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 21:54:34,047 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -642172170, now seen corresponding path program 1 times [2022-07-19 21:54:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832447403] [2022-07-19 21:54:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:34,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070657651] [2022-07-19 21:54:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:34,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:34,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:34,116 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) [2022-07-19 21:54:34,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:54:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 3279 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 21:54:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 282 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-19 21:54:34,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:54:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-07-19 21:54:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:34,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832447403] [2022-07-19 21:54:34,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070657651] [2022-07-19 21:54:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070657651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:54:34,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:54:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-07-19 21:54:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513143974] [2022-07-19 21:54:34,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:54:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:54:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:54:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:54:34,981 INFO L87 Difference]: Start difference. First operand 478 states and 698 transitions. Second operand has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-07-19 21:54:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:35,156 INFO L93 Difference]: Finished difference Result 634 states and 884 transitions. [2022-07-19 21:54:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:54:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 242 [2022-07-19 21:54:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:35,158 INFO L225 Difference]: With dead ends: 634 [2022-07-19 21:54:35,158 INFO L226 Difference]: Without dead ends: 289 [2022-07-19 21:54:35,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:54:35,160 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 3 mSDsluCounter, 2379 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:35,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2732 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 21:54:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-19 21:54:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-07-19 21:54:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 172 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 25 states have return successors, (97), 93 states have call predecessors, (97), 92 states have call successors, (97) [2022-07-19 21:54:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2022-07-19 21:54:35,171 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 242 [2022-07-19 21:54:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:35,171 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2022-07-19 21:54:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-07-19 21:54:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2022-07-19 21:54:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 21:54:35,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:35,174 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:35,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 21:54:35,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:35,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2101338209, now seen corresponding path program 1 times [2022-07-19 21:54:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963994293] [2022-07-19 21:54:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:35,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253042169] [2022-07-19 21:54:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:35,453 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) [2022-07-19 21:54:35,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:54:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 3320 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:54:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:36,196 INFO L390 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 19 treesize of output 7 [2022-07-19 21:54:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 4 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-07-19 21:54:36,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:54:36,757 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-19 21:54:36,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-07-19 21:54:36,763 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-19 21:54:36,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-07-19 21:54:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 27 proven. 78 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2022-07-19 21:54:36,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963994293] [2022-07-19 21:54:36,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253042169] [2022-07-19 21:54:36,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253042169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:54:36,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:54:36,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-07-19 21:54:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10561742] [2022-07-19 21:54:36,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:54:36,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 21:54:36,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 21:54:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-19 21:54:36,802 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) [2022-07-19 21:54:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:37,681 INFO L93 Difference]: Finished difference Result 564 states and 777 transitions. [2022-07-19 21:54:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:54:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) Word has length 253 [2022-07-19 21:54:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:37,683 INFO L225 Difference]: With dead ends: 564 [2022-07-19 21:54:37,683 INFO L226 Difference]: Without dead ends: 294 [2022-07-19 21:54:37,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 21:54:37,685 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 70 mSDsluCounter, 4068 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4392 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:37,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4392 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1122 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2022-07-19 21:54:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-19 21:54:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-07-19 21:54:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 175 states have internal predecessors, (203), 93 states have call successors, (93), 22 states have call predecessors, (93), 26 states have return successors, (115), 93 states have call predecessors, (115), 92 states have call successors, (115) [2022-07-19 21:54:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 411 transitions. [2022-07-19 21:54:37,696 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 411 transitions. Word has length 253 [2022-07-19 21:54:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:37,696 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 411 transitions. [2022-07-19 21:54:37,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 10 states have call successors, (60), 5 states have call predecessors, (60), 6 states have return successors, (57), 7 states have call predecessors, (57), 9 states have call successors, (57) [2022-07-19 21:54:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 411 transitions. [2022-07-19 21:54:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 21:54:37,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:37,698 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:37,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:37,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:54:37,921 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1612948967, now seen corresponding path program 1 times [2022-07-19 21:54:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476498850] [2022-07-19 21:54:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:37,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:37,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:37,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941915788] [2022-07-19 21:54:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:37,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:37,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:37,978 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) [2022-07-19 21:54:37,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:54:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 3320 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:54:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-19 21:54:38,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:54:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:38,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476498850] [2022-07-19 21:54:38,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:38,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941915788] [2022-07-19 21:54:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941915788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:54:38,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:54:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:54:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804473077] [2022-07-19 21:54:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:54:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:54:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:54:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:54:38,542 INFO L87 Difference]: Start difference. First operand 291 states and 411 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-19 21:54:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:38,731 INFO L93 Difference]: Finished difference Result 561 states and 831 transitions. [2022-07-19 21:54:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:54:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 255 [2022-07-19 21:54:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:38,733 INFO L225 Difference]: With dead ends: 561 [2022-07-19 21:54:38,733 INFO L226 Difference]: Without dead ends: 296 [2022-07-19 21:54:38,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:54:38,734 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 7 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:38,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1447 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 21:54:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-19 21:54:38,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2022-07-19 21:54:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 172 states have (on average 1.186046511627907) internal successors, (204), 176 states have internal predecessors, (204), 93 states have call successors, (93), 22 states have call predecessors, (93), 26 states have return successors, (115), 93 states have call predecessors, (115), 92 states have call successors, (115) [2022-07-19 21:54:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 412 transitions. [2022-07-19 21:54:38,748 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 412 transitions. Word has length 255 [2022-07-19 21:54:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:38,748 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 412 transitions. [2022-07-19 21:54:38,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-19 21:54:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 412 transitions. [2022-07-19 21:54:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 21:54:38,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:38,750 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:38,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:38,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 21:54:38,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1368188443, now seen corresponding path program 1 times [2022-07-19 21:54:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:38,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306826907] [2022-07-19 21:54:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:38,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:39,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:39,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92746086] [2022-07-19 21:54:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:39,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:39,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:39,055 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) [2022-07-19 21:54:39,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:54:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 3325 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-19 21:54:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:51,055 INFO L390 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 25 treesize of output 17 [2022-07-19 21:54:51,059 INFO L390 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 21 treesize of output 13 [2022-07-19 21:54:51,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-19 21:54:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 284 proven. 6 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-07-19 21:54:51,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:54:51,691 INFO L390 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 9 treesize of output 3 [2022-07-19 21:54:51,692 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-19 21:54:51,774 INFO L390 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 27 treesize of output 15 [2022-07-19 21:54:51,876 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-19 21:54:51,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-07-19 21:54:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 30 proven. 78 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-19 21:54:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:54:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306826907] [2022-07-19 21:54:51,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:54:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92746086] [2022-07-19 21:54:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92746086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:54:51,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:54:51,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2022-07-19 21:54:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45071076] [2022-07-19 21:54:51,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:54:51,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 21:54:51,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:54:51,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 21:54:51,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1102, Unknown=1, NotChecked=0, Total=1260 [2022-07-19 21:54:51,962 INFO L87 Difference]: Start difference. First operand 292 states and 412 transitions. Second operand has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2022-07-19 21:54:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:54:56,898 INFO L93 Difference]: Finished difference Result 1162 states and 1782 transitions. [2022-07-19 21:54:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:54:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) Word has length 255 [2022-07-19 21:54:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:54:56,905 INFO L225 Difference]: With dead ends: 1162 [2022-07-19 21:54:56,906 INFO L226 Difference]: Without dead ends: 905 [2022-07-19 21:54:56,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 473 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=316, Invalid=2545, Unknown=1, NotChecked=0, Total=2862 [2022-07-19 21:54:56,908 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 791 mSDsluCounter, 7535 mSDsCounter, 0 mSdLazyCounter, 5147 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 8020 SdHoareTripleChecker+Invalid, 7812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 5147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2395 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 21:54:56,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 8020 Invalid, 7812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5147 Invalid, 0 Unknown, 2395 Unchecked, 4.3s Time] [2022-07-19 21:54:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-07-19 21:54:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 824. [2022-07-19 21:54:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 482 states have (on average 1.1784232365145229) internal successors, (568), 490 states have internal predecessors, (568), 269 states have call successors, (269), 62 states have call predecessors, (269), 72 states have return successors, (451), 271 states have call predecessors, (451), 266 states have call successors, (451) [2022-07-19 21:54:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1288 transitions. [2022-07-19 21:54:56,956 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1288 transitions. Word has length 255 [2022-07-19 21:54:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:54:56,956 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1288 transitions. [2022-07-19 21:54:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 5.375) internal successors, (172), 30 states have internal predecessors, (172), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2022-07-19 21:54:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1288 transitions. [2022-07-19 21:54:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-19 21:54:56,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:54:56,959 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:54:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:54:57,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:54:57,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:54:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:54:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 366917770, now seen corresponding path program 1 times [2022-07-19 21:54:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:54:57,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736443163] [2022-07-19 21:54:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:57,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:54:57,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:54:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657409621] [2022-07-19 21:54:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:54:57,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:54:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:54:57,233 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) [2022-07-19 21:54:57,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:54:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:54:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 3364 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-19 21:54:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:54:57,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:54:57,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 21:54:57,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-07-19 21:55:02,043 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-19 21:55:02,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2022-07-19 21:55:02,091 INFO L356 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-07-19 21:55:02,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-07-19 21:55:02,179 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2129 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2129) |c_#memory_$Pointer$.base|)) is different from true [2022-07-19 21:55:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:55:04,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-19 21:55:04,252 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:55:04,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:55:58,773 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2130 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2130)) |c_#memory_$Pointer$.base|)) is different from true [2022-07-19 21:56:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 315 proven. 37 refuted. 0 times theorem prover too weak. 202 trivial. 3 not checked. [2022-07-19 21:56:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:56:26,787 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2138 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_141|) 0 v_ArrVal_2138)) |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.base|) (+ 32 |c_ULTIMATE.start_aws_array_list_set_at_harness_~#list~0#1.offset|)) 0))) is different from false [2022-07-19 21:56:26,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:56:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736443163] [2022-07-19 21:56:26,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:56:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657409621] [2022-07-19 21:56:26,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657409621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:56:26,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:56:26,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-19 21:56:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220011232] [2022-07-19 21:56:26,790 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 21:56:26,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:56:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:56:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:56:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=557, Unknown=27, NotChecked=150, Total=812 [2022-07-19 21:56:26,791 INFO L87 Difference]: Start difference. First operand 824 states and 1288 transitions. Second operand has 28 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 12 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2022-07-19 21:56:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:56:59,003 INFO L93 Difference]: Finished difference Result 1479 states and 2713 transitions. [2022-07-19 21:56:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 21:56:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 12 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) Word has length 261 [2022-07-19 21:56:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:56:59,014 INFO L225 Difference]: With dead ends: 1479 [2022-07-19 21:56:59,014 INFO L226 Difference]: Without dead ends: 1220 [2022-07-19 21:56:59,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 368 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 119.3s TimeCoverageRelationStatistics Valid=141, Invalid=1226, Unknown=51, NotChecked=222, Total=1640 [2022-07-19 21:56:59,018 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 305 mSDsluCounter, 3077 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 8759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6327 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:56:59,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 3492 Invalid, 8759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2124 Invalid, 0 Unknown, 6327 Unchecked, 1.2s Time] [2022-07-19 21:56:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-07-19 21:56:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 896. [2022-07-19 21:56:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 532 states have (on average 1.169172932330827) internal successors, (622), 545 states have internal predecessors, (622), 278 states have call successors, (278), 69 states have call predecessors, (278), 85 states have return successors, (619), 281 states have call predecessors, (619), 275 states have call successors, (619) [2022-07-19 21:56:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1519 transitions. [2022-07-19 21:56:59,133 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1519 transitions. Word has length 261 [2022-07-19 21:56:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:56:59,133 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1519 transitions. [2022-07-19 21:56:59,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 12 states have call successors, (36), 8 states have call predecessors, (36), 11 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2022-07-19 21:56:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1519 transitions. [2022-07-19 21:56:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 21:56:59,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:56:59,136 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:56:59,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:56:59,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:56:59,357 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:56:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:56:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1343783589, now seen corresponding path program 1 times [2022-07-19 21:56:59,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:56:59,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652082950] [2022-07-19 21:56:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:56:59,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:56:59,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:56:59,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501184211] [2022-07-19 21:56:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:56:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:56:59,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:56:59,412 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) [2022-07-19 21:56:59,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:57:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:57:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 3325 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-19 21:57:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:00,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:57:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:57:04,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 21:57:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:57:04,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 21:57:05,320 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2346 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2346) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_2347 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2347)))) is different from true [2022-07-19 21:57:05,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:57:05,545 INFO L390 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 16 treesize of output 18 [2022-07-19 21:57:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:57:05,548 INFO L390 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 16 treesize of output 18 [2022-07-19 21:57:05,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-19 21:57:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 175 proven. 4 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-07-19 21:57:05,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:57:05,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:57:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652082950] [2022-07-19 21:57:05,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:57:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501184211] [2022-07-19 21:57:05,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501184211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:57:05,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:57:05,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-19 21:57:05,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910986806] [2022-07-19 21:57:05,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 21:57:05,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:57:05,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:57:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:57:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=194, Unknown=10, NotChecked=28, Total=272 [2022-07-19 21:57:05,845 INFO L87 Difference]: Start difference. First operand 896 states and 1519 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-07-19 21:57:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:57:09,523 INFO L93 Difference]: Finished difference Result 1526 states and 2841 transitions. [2022-07-19 21:57:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:57:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 255 [2022-07-19 21:57:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:57:09,532 INFO L225 Difference]: With dead ends: 1526 [2022-07-19 21:57:09,533 INFO L226 Difference]: Without dead ends: 1218 [2022-07-19 21:57:09,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=50, Invalid=248, Unknown=12, NotChecked=32, Total=342 [2022-07-19 21:57:09,535 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 169 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 4856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2985 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:57:09,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2133 Invalid, 4856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1723 Invalid, 0 Unknown, 2985 Unchecked, 1.2s Time] [2022-07-19 21:57:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-07-19 21:57:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 897. [2022-07-19 21:57:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 533 states have (on average 1.1688555347091933) internal successors, (623), 546 states have internal predecessors, (623), 278 states have call successors, (278), 69 states have call predecessors, (278), 85 states have return successors, (619), 281 states have call predecessors, (619), 275 states have call successors, (619) [2022-07-19 21:57:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1520 transitions. [2022-07-19 21:57:09,605 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1520 transitions. Word has length 255 [2022-07-19 21:57:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:57:09,606 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1520 transitions. [2022-07-19 21:57:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 14 states have internal predecessors, (92), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-07-19 21:57:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1520 transitions. [2022-07-19 21:57:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-07-19 21:57:09,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:57:09,609 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:57:09,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:57:09,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:09,823 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:57:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:57:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -331499523, now seen corresponding path program 1 times [2022-07-19 21:57:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:57:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118382576] [2022-07-19 21:57:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:57:09,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:57:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878981622] [2022-07-19 21:57:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:09,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:09,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:57:09,876 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) [2022-07-19 21:57:09,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:57:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:57:10,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 3397 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 21:57:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 349 proven. 1 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-19 21:57:10,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:57:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-07-19 21:57:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:57:11,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118382576] [2022-07-19 21:57:11,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:57:11,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878981622] [2022-07-19 21:57:11,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878981622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:57:11,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:57:11,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 31 [2022-07-19 21:57:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841243945] [2022-07-19 21:57:11,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:57:11,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:57:11,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:57:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:57:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2022-07-19 21:57:11,428 INFO L87 Difference]: Start difference. First operand 897 states and 1520 transitions. Second operand has 31 states, 27 states have (on average 5.333333333333333) internal successors, (144), 22 states have internal predecessors, (144), 7 states have call successors, (51), 3 states have call predecessors, (51), 10 states have return successors, (53), 10 states have call predecessors, (53), 6 states have call successors, (53) [2022-07-19 21:57:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:57:12,122 INFO L93 Difference]: Finished difference Result 1638 states and 2810 transitions. [2022-07-19 21:57:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:57:12,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 5.333333333333333) internal successors, (144), 22 states have internal predecessors, (144), 7 states have call successors, (51), 3 states have call predecessors, (51), 10 states have return successors, (53), 10 states have call predecessors, (53), 6 states have call successors, (53) Word has length 296 [2022-07-19 21:57:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:57:12,128 INFO L225 Difference]: With dead ends: 1638 [2022-07-19 21:57:12,128 INFO L226 Difference]: Without dead ends: 900 [2022-07-19 21:57:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 21:57:12,135 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 39 mSDsluCounter, 8960 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 9330 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 21:57:12,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 9330 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 21:57:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-07-19 21:57:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 897. [2022-07-19 21:57:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 533 states have (on average 1.1688555347091933) internal successors, (623), 546 states have internal predecessors, (623), 278 states have call successors, (278), 69 states have call predecessors, (278), 85 states have return successors, (607), 281 states have call predecessors, (607), 275 states have call successors, (607) [2022-07-19 21:57:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1508 transitions. [2022-07-19 21:57:12,204 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1508 transitions. Word has length 296 [2022-07-19 21:57:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:57:12,204 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1508 transitions. [2022-07-19 21:57:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 5.333333333333333) internal successors, (144), 22 states have internal predecessors, (144), 7 states have call successors, (51), 3 states have call predecessors, (51), 10 states have return successors, (53), 10 states have call predecessors, (53), 6 states have call successors, (53) [2022-07-19 21:57:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1508 transitions. [2022-07-19 21:57:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 21:57:12,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:57:12,207 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:57:12,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:57:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:57:12,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:57:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:57:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1637353821, now seen corresponding path program 1 times [2022-07-19 21:57:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:57:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460400792] [2022-07-19 21:57:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:57:12,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:57:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542493209] [2022-07-19 21:57:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:12,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:12,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:57:12,516 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) [2022-07-19 21:57:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:57:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:57:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 3330 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:57:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-19 21:57:13,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:57:13,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:57:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460400792] [2022-07-19 21:57:13,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:57:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542493209] [2022-07-19 21:57:13,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542493209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:57:13,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:57:13,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:57:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113855278] [2022-07-19 21:57:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:57:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:57:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:57:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:57:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:57:13,138 INFO L87 Difference]: Start difference. First operand 897 states and 1508 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-19 21:57:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:57:13,378 INFO L93 Difference]: Finished difference Result 1661 states and 2907 transitions. [2022-07-19 21:57:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:57:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 255 [2022-07-19 21:57:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:57:13,383 INFO L225 Difference]: With dead ends: 1661 [2022-07-19 21:57:13,383 INFO L226 Difference]: Without dead ends: 881 [2022-07-19 21:57:13,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:57:13,388 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 13 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 21:57:13,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1386 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 21:57:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-07-19 21:57:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 880. [2022-07-19 21:57:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 522 states have (on average 1.1647509578544062) internal successors, (608), 534 states have internal predecessors, (608), 274 states have call successors, (274), 69 states have call predecessors, (274), 83 states have return successors, (545), 276 states have call predecessors, (545), 271 states have call successors, (545) [2022-07-19 21:57:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1427 transitions. [2022-07-19 21:57:13,431 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1427 transitions. Word has length 255 [2022-07-19 21:57:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:57:13,432 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1427 transitions. [2022-07-19 21:57:13,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-19 21:57:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1427 transitions. [2022-07-19 21:57:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-19 21:57:13,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:57:13,435 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:57:13,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:57:13,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:57:13,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:57:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:57:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1754534713, now seen corresponding path program 2 times [2022-07-19 21:57:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:57:13,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307384027] [2022-07-19 21:57:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:57:13,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:57:13,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82979275] [2022-07-19 21:57:13,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:57:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:57:13,716 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) [2022-07-19 21:57:13,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:57:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:57:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:57:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 3393 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 21:57:14,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 224 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-07-19 21:57:14,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:57:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 79 proven. 15 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-07-19 21:57:15,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:57:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307384027] [2022-07-19 21:57:15,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:57:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82979275] [2022-07-19 21:57:15,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82979275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:57:15,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:57:15,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2022-07-19 21:57:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726931687] [2022-07-19 21:57:15,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:57:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 21:57:15,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:57:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 21:57:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-07-19 21:57:15,316 INFO L87 Difference]: Start difference. First operand 880 states and 1427 transitions. Second operand has 27 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 7 states have call successors, (45), 3 states have call predecessors, (45), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) [2022-07-19 21:57:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:57:15,955 INFO L93 Difference]: Finished difference Result 1563 states and 2541 transitions. [2022-07-19 21:57:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 21:57:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 7 states have call successors, (45), 3 states have call predecessors, (45), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) Word has length 290 [2022-07-19 21:57:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:57:15,960 INFO L225 Difference]: With dead ends: 1563 [2022-07-19 21:57:15,960 INFO L226 Difference]: Without dead ends: 884 [2022-07-19 21:57:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 552 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:57:15,964 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 37 mSDsluCounter, 8198 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 8566 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 21:57:15,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 8566 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 21:57:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-19 21:57:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 880. [2022-07-19 21:57:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 522 states have (on average 1.1647509578544062) internal successors, (608), 534 states have internal predecessors, (608), 274 states have call successors, (274), 69 states have call predecessors, (274), 83 states have return successors, (536), 276 states have call predecessors, (536), 271 states have call successors, (536) [2022-07-19 21:57:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1418 transitions. [2022-07-19 21:57:16,009 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1418 transitions. Word has length 290 [2022-07-19 21:57:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:57:16,009 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1418 transitions. [2022-07-19 21:57:16,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.913043478260869) internal successors, (136), 18 states have internal predecessors, (136), 7 states have call successors, (45), 3 states have call predecessors, (45), 9 states have return successors, (48), 11 states have call predecessors, (48), 6 states have call successors, (48) [2022-07-19 21:57:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1418 transitions. [2022-07-19 21:57:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-07-19 21:57:16,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:57:16,012 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:57:16,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:57:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:57:16,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:57:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:57:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 307318545, now seen corresponding path program 3 times [2022-07-19 21:57:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:57:16,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317090263] [2022-07-19 21:57:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:57:16,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:57:16,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128185503] [2022-07-19 21:57:16,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:57:16,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:16,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:57:16,299 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) [2022-07-19 21:57:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:57:22,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:57:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:57:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 21:57:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-07-19 21:57:23,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:57:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:57:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317090263] [2022-07-19 21:57:23,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:57:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128185503] [2022-07-19 21:57:23,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128185503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:57:23,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:57:23,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 21:57:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140710355] [2022-07-19 21:57:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:57:23,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:57:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:57:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:57:23,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:57:23,116 INFO L87 Difference]: Start difference. First operand 880 states and 1418 transitions. Second operand has 12 states, 11 states have (on average 10.272727272727273) internal successors, (113), 9 states have internal predecessors, (113), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2022-07-19 21:57:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 21:57:23,464 INFO L93 Difference]: Finished difference Result 1568 states and 2548 transitions. [2022-07-19 21:57:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:57:23,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.272727272727273) internal successors, (113), 9 states have internal predecessors, (113), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) Word has length 284 [2022-07-19 21:57:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 21:57:23,469 INFO L225 Difference]: With dead ends: 1568 [2022-07-19 21:57:23,469 INFO L226 Difference]: Without dead ends: 880 [2022-07-19 21:57:23,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:57:23,472 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 11 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3998 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 21:57:23,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3998 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 21:57:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-19 21:57:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-07-19 21:57:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 522 states have (on average 1.1647509578544062) internal successors, (608), 534 states have internal predecessors, (608), 274 states have call successors, (274), 69 states have call predecessors, (274), 83 states have return successors, (527), 276 states have call predecessors, (527), 271 states have call successors, (527) [2022-07-19 21:57:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1409 transitions. [2022-07-19 21:57:23,515 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1409 transitions. Word has length 284 [2022-07-19 21:57:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 21:57:23,515 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1409 transitions. [2022-07-19 21:57:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.272727272727273) internal successors, (113), 9 states have internal predecessors, (113), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (36), 5 states have call predecessors, (36), 3 states have call successors, (36) [2022-07-19 21:57:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1409 transitions. [2022-07-19 21:57:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-19 21:57:23,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 21:57:23,518 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:57:23,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:57:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:57:23,731 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:57:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:57:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1844390939, now seen corresponding path program 1 times [2022-07-19 21:57:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:57:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906457397] [2022-07-19 21:57:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:57:23,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:57:23,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020618859] [2022-07-19 21:57:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:57:23,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:57:23,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:57:23,791 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) [2022-07-19 21:57:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:57:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:57:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 3377 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 21:57:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:57:24,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:57:24,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 21:57:24,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-07-19 21:57:28,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-07-19 21:57:32,754 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-19 21:57:32,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2022-07-19 21:57:32,807 INFO L356 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-07-19 21:57:32,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-07-19 21:57:32,888 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3264 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3264))) is different from true [2022-07-19 21:57:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:57:35,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-19 21:57:35,061 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:57:35,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:58:35,229 WARN L855 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_3266 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$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| v_ArrVal_3266)))) is different from true