./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.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 f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:02:13,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:02:13,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:02:13,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:02:13,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:02:13,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:02:13,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:02:13,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:02:13,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:02:13,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:02:13,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:02:13,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:02:13,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:02:13,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:02:13,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:02:13,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:02:13,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:02:13,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:02:13,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:02:13,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:02:13,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:02:13,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:02:13,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:02:13,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:02:13,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:02:13,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:02:13,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:02:13,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:02:13,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:02:13,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:02:13,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:02:13,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:02:13,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:02:13,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:02:13,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:02:13,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:02:13,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:02:13,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:02:13,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:02:13,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:02:13,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:02:13,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:02:13,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:02:13,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:02:13,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:02:13,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:02:13,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:02:13,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:02:13,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:02:13,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:02:13,456 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:02:13,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:02:13,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:02:13,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:02:13,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:02:13,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:02:13,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:02:13,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:02:13,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:02:13,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:02:13,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:02:13,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:02:13,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:02:13,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:02:13,468 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:02:13,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:02:13,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:02:13,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:02:13,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 [2021-12-22 14:02:13,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:02:13,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:02:13,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:02:13,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:02:13,673 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:02:13,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2021-12-22 14:02:13,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f288e3d78/9cbc5d9d6d1449a4875012c688ac566d/FLAGdf222aff0 [2021-12-22 14:02:14,365 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:02:14,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2021-12-22 14:02:14,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f288e3d78/9cbc5d9d6d1449a4875012c688ac566d/FLAGdf222aff0 [2021-12-22 14:02:14,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f288e3d78/9cbc5d9d6d1449a4875012c688ac566d [2021-12-22 14:02:14,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:02:14,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:02:14,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:02:14,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:02:14,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:02:14,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:14" (1/1) ... [2021-12-22 14:02:14,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4620ba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:14, skipping insertion in model container [2021-12-22 14:02:14,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:14" (1/1) ... [2021-12-22 14:02:14,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:02:14,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:02:14,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2021-12-22 14:02:14,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2021-12-22 14:02:15,583 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:02:15,644 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,652 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,652 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,660 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,661 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:15,980 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:02:15,981 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:02:15,982 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:02:15,982 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:02:15,983 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:02:15,983 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:02:15,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:02:15,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:02:15,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:02:15,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:02:16,062 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:02:16,130 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:02:16,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2021-12-22 14:02:16,139 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2021-12-22 14:02:16,157 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:02:16,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,168 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,193 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:02:16,194 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:02:16,194 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:02:16,195 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:02:16,195 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:02:16,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:02:16,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:02:16,196 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:02:16,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:02:16,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:02:16,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:16,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:02:16,397 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:02:16,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16 WrapperNode [2021-12-22 14:02:16,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:02:16,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:02:16,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:02:16,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:02:16,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,544 INFO L137 Inliner]: procedures = 689, calls = 1517, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 742 [2021-12-22 14:02:16,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:02:16,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:02:16,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:02:16,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:02:16,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:02:16,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:02:16,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:02:16,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:02:16,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (1/1) ... [2021-12-22 14:02:16,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:02:16,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:16,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:02:16,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:02:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-22 14:02:16,716 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-22 14:02:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:02:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-22 14:02:16,716 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-22 14:02:16,716 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 14:02:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 14:02:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-22 14:02:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-22 14:02:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:02:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-22 14:02:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-22 14:02:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 14:02:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 14:02:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:02:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:02:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:02:16,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:02:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:02:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 14:02:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 14:02:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2021-12-22 14:02:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2021-12-22 14:02:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-22 14:02:16,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-22 14:02:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-22 14:02:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-22 14:02:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-22 14:02:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-22 14:02:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:02:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:02:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:02:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:02:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:02:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 14:02:16,723 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 14:02:16,723 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-22 14:02:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-22 14:02:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:02:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-22 14:02:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-22 14:02:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-22 14:02:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-22 14:02:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:02:16,930 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:02:16,932 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:02:17,582 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:02:17,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:02:17,589 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-22 14:02:17,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:17 BoogieIcfgContainer [2021-12-22 14:02:17,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:02:17,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:02:17,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:02:17,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:02:17,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:02:14" (1/3) ... [2021-12-22 14:02:17,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d679b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:17, skipping insertion in model container [2021-12-22 14:02:17,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:16" (2/3) ... [2021-12-22 14:02:17,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d679b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:17, skipping insertion in model container [2021-12-22 14:02:17,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:17" (3/3) ... [2021-12-22 14:02:17,596 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness-1.i [2021-12-22 14:02:17,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:02:17,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:02:17,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:02:17,638 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:02:17,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:02:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-22 14:02:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-22 14:02:17,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:17,661 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:17,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1293047729, now seen corresponding path program 1 times [2021-12-22 14:02:17,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:17,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635597412] [2021-12-22 14:02:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:17,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:02:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:02:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:02:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 14:02:18,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635597412] [2021-12-22 14:02:18,069 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-22 14:02:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735879038] [2021-12-22 14:02:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:18,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:18,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:18,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:18,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:02:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 14:02:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-22 14:02:18,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735879038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:18,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 14:02:18,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263540150] [2021-12-22 14:02:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:18,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 14:02:18,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 14:02:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:02:18,645 INFO L87 Difference]: Start difference. First operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-22 14:02:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:18,673 INFO L93 Difference]: Finished difference Result 401 states and 585 transitions. [2021-12-22 14:02:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 14:02:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 112 [2021-12-22 14:02:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:18,681 INFO L225 Difference]: With dead ends: 401 [2021-12-22 14:02:18,681 INFO L226 Difference]: Without dead ends: 198 [2021-12-22 14:02:18,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:02:18,687 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:18,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-22 14:02:18,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-12-22 14:02:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 125 states have (on average 1.224) internal successors, (153), 127 states have internal predecessors, (153), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-22 14:02:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2021-12-22 14:02:18,722 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 112 [2021-12-22 14:02:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:18,723 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2021-12-22 14:02:18,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-22 14:02:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2021-12-22 14:02:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-22 14:02:18,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:18,726 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 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] [2021-12-22 14:02:18,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 14:02:18,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 14:02:18,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1403140028, now seen corresponding path program 1 times [2021-12-22 14:02:18,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:18,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188117034] [2021-12-22 14:02:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:18,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:19,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:19,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949410570] [2021-12-22 14:02:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:19,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:19,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:19,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:19,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:02:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 14:02:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 14:02:19,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:19,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188117034] [2021-12-22 14:02:19,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949410570] [2021-12-22 14:02:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949410570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:19,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:19,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:02:19,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778946022] [2021-12-22 14:02:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:02:19,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:02:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:19,600 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-22 14:02:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:19,658 INFO L93 Difference]: Finished difference Result 302 states and 404 transitions. [2021-12-22 14:02:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:02:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2021-12-22 14:02:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:19,668 INFO L225 Difference]: With dead ends: 302 [2021-12-22 14:02:19,668 INFO L226 Difference]: Without dead ends: 203 [2021-12-22 14:02:19,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:19,673 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 2 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:19,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1035 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-22 14:02:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-22 14:02:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 131 states have internal predecessors, (157), 56 states have call successors, (56), 16 states have call predecessors, (56), 17 states have return successors, (57), 55 states have call predecessors, (57), 54 states have call successors, (57) [2021-12-22 14:02:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 270 transitions. [2021-12-22 14:02:19,694 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 270 transitions. Word has length 146 [2021-12-22 14:02:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:19,695 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 270 transitions. [2021-12-22 14:02:19,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-22 14:02:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 270 transitions. [2021-12-22 14:02:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 14:02:19,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:19,697 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 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] [2021-12-22 14:02:19,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-22 14:02:19,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 494695836, now seen corresponding path program 1 times [2021-12-22 14:02:19,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:19,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326412259] [2021-12-22 14:02:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:19,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:19,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535699895] [2021-12-22 14:02:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:19,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:19,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:19,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:02:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 2388 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 14:02:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-12-22 14:02:20,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-22 14:02:20,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326412259] [2021-12-22 14:02:20,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535699895] [2021-12-22 14:02:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535699895] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:20,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:20,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2021-12-22 14:02:20,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371104587] [2021-12-22 14:02:20,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:02:20,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:02:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:02:20,892 INFO L87 Difference]: Start difference. First operand 203 states and 270 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-22 14:02:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:20,943 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2021-12-22 14:02:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:02:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 147 [2021-12-22 14:02:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:20,945 INFO L225 Difference]: With dead ends: 211 [2021-12-22 14:02:20,945 INFO L226 Difference]: Without dead ends: 209 [2021-12-22 14:02:20,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:02:20,946 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 4 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:20,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1031 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-22 14:02:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-12-22 14:02:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 135 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2021-12-22 14:02:20,962 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 147 [2021-12-22 14:02:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:20,962 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2021-12-22 14:02:20,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-22 14:02:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2021-12-22 14:02:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 14:02:20,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:20,967 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 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] [2021-12-22 14:02:20,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:21,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:21,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash 496542878, now seen corresponding path program 1 times [2021-12-22 14:02:21,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:21,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561707806] [2021-12-22 14:02:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:21,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:21,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:21,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392643747] [2021-12-22 14:02:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:21,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:21,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:21,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:02:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2393 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 14:02:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-22 14:02:21,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:21,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561707806] [2021-12-22 14:02:21,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392643747] [2021-12-22 14:02:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392643747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:21,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:21,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:02:21,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998387699] [2021-12-22 14:02:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:21,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:02:21,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:02:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:21,807 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-22 14:02:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:21,853 INFO L93 Difference]: Finished difference Result 401 states and 523 transitions. [2021-12-22 14:02:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:02:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 147 [2021-12-22 14:02:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:21,855 INFO L225 Difference]: With dead ends: 401 [2021-12-22 14:02:21,855 INFO L226 Difference]: Without dead ends: 208 [2021-12-22 14:02:21,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:02:21,856 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 13 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:21,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1263 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-22 14:02:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-22 14:02:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 135 states have internal predecessors, (159), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2021-12-22 14:02:21,866 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 147 [2021-12-22 14:02:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:21,867 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2021-12-22 14:02:21,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-22 14:02:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2021-12-22 14:02:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-22 14:02:21,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:21,869 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:21,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,087 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -50417486, now seen corresponding path program 1 times [2021-12-22 14:02:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341122236] [2021-12-22 14:02:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:22,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:22,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074103554] [2021-12-22 14:02:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:22,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:22,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:02:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:22,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2407 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:02:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 14:02:22,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:22,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341122236] [2021-12-22 14:02:22,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074103554] [2021-12-22 14:02:22,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074103554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:22,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:22,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:02:22,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566769309] [2021-12-22 14:02:22,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:22,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:02:22,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:02:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:02:22,684 INFO L87 Difference]: Start difference. First operand 208 states and 274 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-22 14:02:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:22,710 INFO L93 Difference]: Finished difference Result 397 states and 520 transitions. [2021-12-22 14:02:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:02:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 149 [2021-12-22 14:02:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:22,712 INFO L225 Difference]: With dead ends: 397 [2021-12-22 14:02:22,712 INFO L226 Difference]: Without dead ends: 210 [2021-12-22 14:02:22,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:02:22,713 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 1 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:22,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 517 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-22 14:02:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-12-22 14:02:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 136 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 275 transitions. [2021-12-22 14:02:22,721 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 275 transitions. Word has length 149 [2021-12-22 14:02:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:22,721 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 275 transitions. [2021-12-22 14:02:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-22 14:02:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 275 transitions. [2021-12-22 14:02:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 14:02:22,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:22,723 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 14:02:22,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 14:02:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2024331122, now seen corresponding path program 1 times [2021-12-22 14:02:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:22,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654614124] [2021-12-22 14:02:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:22,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:22,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360286725] [2021-12-22 14:02:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:22,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 14:02:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 14:02:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-22 14:02:23,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-12-22 14:02:24,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654614124] [2021-12-22 14:02:24,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360286725] [2021-12-22 14:02:24,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360286725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:24,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:24,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-22 14:02:24,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890034977] [2021-12-22 14:02:24,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:24,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 14:02:24,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 14:02:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:02:24,094 INFO L87 Difference]: Start difference. First operand 209 states and 275 transitions. Second operand has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:24,195 INFO L93 Difference]: Finished difference Result 406 states and 527 transitions. [2021-12-22 14:02:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:02:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 153 [2021-12-22 14:02:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:24,197 INFO L225 Difference]: With dead ends: 406 [2021-12-22 14:02:24,197 INFO L226 Difference]: Without dead ends: 212 [2021-12-22 14:02:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-22 14:02:24,198 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 35 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1767 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-22 14:02:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-12-22 14:02:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 135 states have (on average 1.2) internal successors, (162), 138 states have internal predecessors, (162), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2021-12-22 14:02:24,205 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 153 [2021-12-22 14:02:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2021-12-22 14:02:24,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2021-12-22 14:02:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 14:02:24,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:24,207 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:24,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:24,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:24,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1553173810, now seen corresponding path program 2 times [2021-12-22 14:02:24,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:24,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809649577] [2021-12-22 14:02:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:24,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:24,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484844269] [2021-12-22 14:02:24,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:02:24,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:24,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:24,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 14:02:25,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:02:25,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:02:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 14:02:25,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 167 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-22 14:02:25,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-22 14:02:25,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809649577] [2021-12-22 14:02:25,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484844269] [2021-12-22 14:02:25,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484844269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:25,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:25,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-22 14:02:25,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913662785] [2021-12-22 14:02:25,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:25,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 14:02:25,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 14:02:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:02:25,771 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:25,929 INFO L93 Difference]: Finished difference Result 410 states and 531 transitions. [2021-12-22 14:02:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:02:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 157 [2021-12-22 14:02:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:25,931 INFO L225 Difference]: With dead ends: 410 [2021-12-22 14:02:25,931 INFO L226 Difference]: Without dead ends: 214 [2021-12-22 14:02:25,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:02:25,932 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 29 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:25,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2019 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:02:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-22 14:02:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-12-22 14:02:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 137 states have (on average 1.197080291970803) internal successors, (164), 140 states have internal predecessors, (164), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2021-12-22 14:02:25,939 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 157 [2021-12-22 14:02:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:25,939 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2021-12-22 14:02:25,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2021-12-22 14:02:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 14:02:25,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:25,941 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:25,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:26,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:26,159 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1663013362, now seen corresponding path program 3 times [2021-12-22 14:02:26,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900820614] [2021-12-22 14:02:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:26,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:26,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170292228] [2021-12-22 14:02:26,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 14:02:26,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:26,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:26,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:26,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 14:02:27,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 14:02:27,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:02:27,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 14:02:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-22 14:02:28,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-22 14:02:28,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900820614] [2021-12-22 14:02:28,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170292228] [2021-12-22 14:02:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170292228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:28,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:28,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-22 14:02:28,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285038207] [2021-12-22 14:02:28,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:28,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 14:02:28,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 14:02:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-22 14:02:28,506 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-22 14:02:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:28,705 INFO L93 Difference]: Finished difference Result 414 states and 535 transitions. [2021-12-22 14:02:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 14:02:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 161 [2021-12-22 14:02:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:28,708 INFO L225 Difference]: With dead ends: 414 [2021-12-22 14:02:28,708 INFO L226 Difference]: Without dead ends: 216 [2021-12-22 14:02:28,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-22 14:02:28,710 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 37 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:28,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2523 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:02:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-22 14:02:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-12-22 14:02:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 142 states have internal predecessors, (166), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 281 transitions. [2021-12-22 14:02:28,724 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 281 transitions. Word has length 161 [2021-12-22 14:02:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:28,724 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 281 transitions. [2021-12-22 14:02:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-22 14:02:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 281 transitions. [2021-12-22 14:02:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-22 14:02:28,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:28,727 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:28,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 14:02:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-22 14:02:28,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -650271310, now seen corresponding path program 4 times [2021-12-22 14:02:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300713382] [2021-12-22 14:02:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:28,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:28,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379778609] [2021-12-22 14:02:28,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 14:02:28,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:28,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:28,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 14:02:29,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 14:02:29,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:02:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 14:02:29,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 195 proven. 16 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-22 14:02:29,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-22 14:02:30,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300713382] [2021-12-22 14:02:30,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379778609] [2021-12-22 14:02:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379778609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:30,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:30,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-22 14:02:30,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952082958] [2021-12-22 14:02:30,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:30,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 14:02:30,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 14:02:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-22 14:02:30,243 INFO L87 Difference]: Start difference. First operand 215 states and 281 transitions. Second operand has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 19 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:30,456 INFO L93 Difference]: Finished difference Result 418 states and 539 transitions. [2021-12-22 14:02:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 14:02:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 19 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 165 [2021-12-22 14:02:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:30,459 INFO L225 Difference]: With dead ends: 418 [2021-12-22 14:02:30,459 INFO L226 Difference]: Without dead ends: 218 [2021-12-22 14:02:30,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-22 14:02:30,462 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 38 mSDsluCounter, 3026 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:30,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3281 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:02:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-22 14:02:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-12-22 14:02:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 283 transitions. [2021-12-22 14:02:30,469 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 283 transitions. Word has length 165 [2021-12-22 14:02:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:30,471 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 283 transitions. [2021-12-22 14:02:30,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 19 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 283 transitions. [2021-12-22 14:02:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-22 14:02:30,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:30,473 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:30,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:30,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:30,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1517193330, now seen corresponding path program 5 times [2021-12-22 14:02:30,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143580777] [2021-12-22 14:02:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:30,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:30,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132765835] [2021-12-22 14:02:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 14:02:30,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:30,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 14:02:31,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-22 14:02:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:02:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 14:02:31,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 215 proven. 25 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-22 14:02:31,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-22 14:02:32,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143580777] [2021-12-22 14:02:32,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132765835] [2021-12-22 14:02:32,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132765835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:02:32,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:02:32,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-22 14:02:32,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553169352] [2021-12-22 14:02:32,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:32,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 14:02:32,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 14:02:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-22 14:02:32,514 INFO L87 Difference]: Start difference. First operand 217 states and 283 transitions. Second operand has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:32,747 INFO L93 Difference]: Finished difference Result 422 states and 543 transitions. [2021-12-22 14:02:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 14:02:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2021-12-22 14:02:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:32,749 INFO L225 Difference]: With dead ends: 422 [2021-12-22 14:02:32,749 INFO L226 Difference]: Without dead ends: 220 [2021-12-22 14:02:32,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-12-22 14:02:32,751 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 41 mSDsluCounter, 3026 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:32,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3281 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:02:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-22 14:02:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-12-22 14:02:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 146 states have internal predecessors, (170), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2021-12-22 14:02:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 285 transitions. [2021-12-22 14:02:32,757 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 285 transitions. Word has length 169 [2021-12-22 14:02:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:32,757 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 285 transitions. [2021-12-22 14:02:32,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-22 14:02:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 285 transitions. [2021-12-22 14:02:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-22 14:02:32,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:32,759 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 14:02:32,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:32,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 14:02:32,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1933379022, now seen corresponding path program 6 times [2021-12-22 14:02:32,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:32,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515190540] [2021-12-22 14:02:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:32,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:33,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803513120] [2021-12-22 14:02:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 14:02:33,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:33,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:33,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:33,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process