./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:58:18,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:58:18,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:58:18,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:58:18,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:58:18,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:58:18,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:58:18,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:58:18,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:58:18,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:58:18,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:58:18,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:58:18,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:58:18,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:58:18,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:58:18,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:58:18,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:58:18,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:58:18,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:58:18,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:58:18,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:58:18,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:58:18,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:58:18,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:58:18,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:58:18,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:58:18,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:58:18,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:58:18,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:58:18,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:58:18,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:58:18,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:58:18,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:58:18,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:58:18,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:58:18,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:58:18,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:58:18,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:58:18,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:58:18,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:58:18,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:58:18,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 13:58:18,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:58:18,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:58:18,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:58:18,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:58:18,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:58:18,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:58:18,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:58:18,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:58:18,556 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:58:18,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:58:18,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:58:18,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:58:18,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:58:18,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:58:18,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:58:18,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:58:18,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:58:18,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:58:18,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:58:18,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:58:18,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:58:18,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:58:18,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:58:18,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:58:18,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:58:18,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:58:18,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a [2021-12-22 13:58:18,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:58:18,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:58:18,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:58:18,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:58:18,773 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:58:18,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-12-22 13:58:18,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9608cfd/966ae17978224a7482157191dae0ecff/FLAGdb46bcac9 [2021-12-22 13:58:19,338 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:58:19,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-12-22 13:58:19,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9608cfd/966ae17978224a7482157191dae0ecff/FLAGdb46bcac9 [2021-12-22 13:58:19,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9608cfd/966ae17978224a7482157191dae0ecff [2021-12-22 13:58:19,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:58:19,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:58:19,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:58:19,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:58:19,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:58:19,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:19" (1/1) ... [2021-12-22 13:58:19,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73168b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:19, skipping insertion in model container [2021-12-22 13:58:19,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:19" (1/1) ... [2021-12-22 13:58:19,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:58:19,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:58:19,851 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_byte_cursor_read_be32_harness.i[4499,4512] [2021-12-22 13:58:19,856 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_byte_cursor_read_be32_harness.i[4559,4572] [2021-12-22 13:58:20,329 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,329 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,330 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,334 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,347 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,350 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:20,690 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:58:20,691 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:58:20,692 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:58:20,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:58:20,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:58:20,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:58:20,697 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:58:20,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:58:20,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:58:20,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:58:20,906 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:58:21,030 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,031 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:58:21,147 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:58:21,156 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_byte_cursor_read_be32_harness.i[4499,4512] [2021-12-22 13:58:21,157 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_byte_cursor_read_be32_harness.i[4559,4572] [2021-12-22 13:58:21,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,176 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,179 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,179 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,180 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,180 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,197 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 13:58:21,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 13:58:21,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 13:58:21,199 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 13:58:21,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 13:58:21,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 13:58:21,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 13:58:21,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 13:58:21,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 13:58:21,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 13:58:21,212 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 13:58:21,241 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,241 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 13:58:21,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:58:21,409 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:58:21,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21 WrapperNode [2021-12-22 13:58:21,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:58:21,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:58:21,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:58:21,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:58:21,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,522 INFO L137 Inliner]: procedures = 691, calls = 2645, calls flagged for inlining = 62, calls inlined = 11, statements flattened = 975 [2021-12-22 13:58:21,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:58:21,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:58:21,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:58:21,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:58:21,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:58:21,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:58:21,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:58:21,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:58:21,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (1/1) ... [2021-12-22 13:58:21,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:58:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:21,636 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 13:58:21,645 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 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2021-12-22 13:58:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-22 13:58:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure ntohl [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 13:58:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 13:58:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh32 [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh32 [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-22 13:58:21,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 13:58:21,697 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-22 13:58:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 13:58:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-22 13:58:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-12-22 13:58:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:58:21,911 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:58:21,913 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:58:22,693 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:58:22,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:58:22,702 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:58:22,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:22 BoogieIcfgContainer [2021-12-22 13:58:22,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:58:22,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:58:22,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:58:22,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:58:22,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:58:19" (1/3) ... [2021-12-22 13:58:22,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a53abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:22, skipping insertion in model container [2021-12-22 13:58:22,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:21" (2/3) ... [2021-12-22 13:58:22,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a53abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:22, skipping insertion in model container [2021-12-22 13:58:22,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:22" (3/3) ... [2021-12-22 13:58:22,709 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be32_harness.i [2021-12-22 13:58:22,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:58:22,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:58:22,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:58:22,772 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:58:22,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 13:58:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-22 13:58:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 13:58:22,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:22,805 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:22,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1619030086, now seen corresponding path program 1 times [2021-12-22 13:58:22,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062894581] [2021-12-22 13:58:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:22,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:58:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:58:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:58:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:58:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:58:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:58:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:58:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 13:58:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 13:58:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:58:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-12-22 13:58:23,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062894581] [2021-12-22 13:58:23,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062894581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:23,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:23,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:58:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201746381] [2021-12-22 13:58:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:23,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:58:23,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:58:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:58:23,493 INFO L87 Difference]: Start difference. First operand has 158 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:23,940 INFO L93 Difference]: Finished difference Result 316 states and 460 transitions. [2021-12-22 13:58:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:58:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 124 [2021-12-22 13:58:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:23,965 INFO L225 Difference]: With dead ends: 316 [2021-12-22 13:58:23,966 INFO L226 Difference]: Without dead ends: 159 [2021-12-22 13:58:23,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:58:23,972 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 109 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:23,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 275 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:58:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-22 13:58:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-12-22 13:58:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 93 states have internal predecessors, (112), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-22 13:58:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 207 transitions. [2021-12-22 13:58:24,053 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 207 transitions. Word has length 124 [2021-12-22 13:58:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 207 transitions. [2021-12-22 13:58:24,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 207 transitions. [2021-12-22 13:58:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 13:58:24,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:24,056 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:24,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:58:24,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1826334412, now seen corresponding path program 1 times [2021-12-22 13:58:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036834848] [2021-12-22 13:58:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:58:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 13:58:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 13:58:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:58:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:58:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 13:58:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:58:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:58:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 13:58:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 13:58:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:58:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-22 13:58:24,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:24,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036834848] [2021-12-22 13:58:24,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036834848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:24,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893228567] [2021-12-22 13:58:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:24,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:24,400 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 13:58:24,401 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 13:58:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 2740 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:58:24,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-22 13:58:25,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:25,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893228567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:25,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:25,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-22 13:58:25,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137332522] [2021-12-22 13:58:25,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:25,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:58:25,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:58:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:58:25,003 INFO L87 Difference]: Start difference. First operand 152 states and 207 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:58:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:25,148 INFO L93 Difference]: Finished difference Result 280 states and 393 transitions. [2021-12-22 13:58:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:58:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 124 [2021-12-22 13:58:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:25,151 INFO L225 Difference]: With dead ends: 280 [2021-12-22 13:58:25,151 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 13:58:25,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:58:25,152 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 230 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:25,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 428 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 13:58:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-22 13:58:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (55), 47 states have call predecessors, (55), 47 states have call successors, (55) [2021-12-22 13:58:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 217 transitions. [2021-12-22 13:58:25,165 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 217 transitions. Word has length 124 [2021-12-22 13:58:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:25,165 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 217 transitions. [2021-12-22 13:58:25,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:58:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 217 transitions. [2021-12-22 13:58:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 13:58:25,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:25,167 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:25,191 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 13:58:25,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:25,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1417930777, now seen corresponding path program 1 times [2021-12-22 13:58:25,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:25,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268869653] [2021-12-22 13:58:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:25,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:58:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 13:58:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:58:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:58:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 13:58:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:58:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-22 13:58:25,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268869653] [2021-12-22 13:58:25,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268869653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145440209] [2021-12-22 13:58:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:25,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:25,674 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 13:58:25,675 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 13:58:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:58:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-22 13:58:26,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:26,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145440209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:26,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:26,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-22 13:58:26,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187401214] [2021-12-22 13:58:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:26,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:58:26,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:58:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:58:26,324 INFO L87 Difference]: Start difference. First operand 155 states and 217 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:58:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:26,504 INFO L93 Difference]: Finished difference Result 266 states and 374 transitions. [2021-12-22 13:58:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:58:26,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 126 [2021-12-22 13:58:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:26,506 INFO L225 Difference]: With dead ends: 266 [2021-12-22 13:58:26,506 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 13:58:26,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:58:26,508 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 248 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:26,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 566 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 13:58:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-22 13:58:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-22 13:58:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 215 transitions. [2021-12-22 13:58:26,519 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 215 transitions. Word has length 126 [2021-12-22 13:58:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:26,520 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 215 transitions. [2021-12-22 13:58:26,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-22 13:58:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 215 transitions. [2021-12-22 13:58:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 13:58:26,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:26,522 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:26,542 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 13:58:26,743 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,SelfDestructingSolverStorable2 [2021-12-22 13:58:26,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash -690371052, now seen corresponding path program 2 times [2021-12-22 13:58:26,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:26,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725331830] [2021-12-22 13:58:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:26,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:58:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:58:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:58:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 13:58:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:58:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-22 13:58:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725331830] [2021-12-22 13:58:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725331830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233895890] [2021-12-22 13:58:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:58:27,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:27,110 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 13:58:27,111 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 13:58:27,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:58:27,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:58:27,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:58:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-22 13:58:28,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:28,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233895890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:28,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:28,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 13 [2021-12-22 13:58:28,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259757071] [2021-12-22 13:58:28,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:58:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:58:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:58:28,186 INFO L87 Difference]: Start difference. First operand 155 states and 215 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:58:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:28,332 INFO L93 Difference]: Finished difference Result 260 states and 361 transitions. [2021-12-22 13:58:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:58:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 128 [2021-12-22 13:58:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:28,333 INFO L225 Difference]: With dead ends: 260 [2021-12-22 13:58:28,333 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 13:58:28,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:58:28,334 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 105 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:28,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1142 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 13:58:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-22 13:58:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-22 13:58:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 212 transitions. [2021-12-22 13:58:28,358 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 212 transitions. Word has length 128 [2021-12-22 13:58:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:28,359 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 212 transitions. [2021-12-22 13:58:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:58:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 212 transitions. [2021-12-22 13:58:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 13:58:28,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:28,360 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:28,407 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 13:58:28,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:28,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1463523847, now seen corresponding path program 3 times [2021-12-22 13:58:28,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:28,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46356650] [2021-12-22 13:58:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:28,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:28,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:58:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:58:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-22 13:58:29,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46356650] [2021-12-22 13:58:29,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46356650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813773000] [2021-12-22 13:58:29,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:58:29,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:29,120 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 13:58:29,147 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 13:58:29,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:58:29,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:58:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:58:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-22 13:58:29,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813773000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:29,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:29,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2021-12-22 13:58:29,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562831700] [2021-12-22 13:58:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:29,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:58:29,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:58:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:58:29,670 INFO L87 Difference]: Start difference. First operand 155 states and 212 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:58:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:29,754 INFO L93 Difference]: Finished difference Result 255 states and 347 transitions. [2021-12-22 13:58:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:58:29,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 130 [2021-12-22 13:58:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:29,757 INFO L225 Difference]: With dead ends: 255 [2021-12-22 13:58:29,757 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 13:58:29,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:58:29,758 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 2 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:29,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1124 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 13:58:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-22 13:58:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (49), 47 states have call predecessors, (49), 47 states have call successors, (49) [2021-12-22 13:58:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 211 transitions. [2021-12-22 13:58:29,773 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 211 transitions. Word has length 130 [2021-12-22 13:58:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 211 transitions. [2021-12-22 13:58:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:58:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 211 transitions. [2021-12-22 13:58:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-22 13:58:29,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:29,775 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:29,822 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 13:58:29,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:29,996 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1474768542, now seen corresponding path program 4 times [2021-12-22 13:58:29,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798655275] [2021-12-22 13:58:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:29,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:58:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:58:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-22 13:58:30,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798655275] [2021-12-22 13:58:30,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798655275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928210387] [2021-12-22 13:58:30,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:58:30,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:30,411 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 13:58:30,463 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 13:58:30,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:58:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:58:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:58:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-22 13:58:31,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928210387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:31,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:31,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2021-12-22 13:58:31,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198607454] [2021-12-22 13:58:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:31,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:58:31,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:58:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:58:31,226 INFO L87 Difference]: Start difference. First operand 155 states and 211 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:58:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:31,588 INFO L93 Difference]: Finished difference Result 249 states and 335 transitions. [2021-12-22 13:58:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:58:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 132 [2021-12-22 13:58:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:31,590 INFO L225 Difference]: With dead ends: 249 [2021-12-22 13:58:31,590 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 13:58:31,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:58:31,591 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 280 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:31,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1029 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:58:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 13:58:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-22 13:58:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-12-22 13:58:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2021-12-22 13:58:31,599 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 132 [2021-12-22 13:58:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:31,600 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2021-12-22 13:58:31,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-22 13:58:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2021-12-22 13:58:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 13:58:31,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:31,601 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:31,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:31,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:31,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:31,815 INFO L85 PathProgramCache]: Analyzing trace with hash 248232963, now seen corresponding path program 1 times [2021-12-22 13:58:31,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:31,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251806792] [2021-12-22 13:58:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:31,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:31,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:31,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:31,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:31,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:58:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:58:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-22 13:58:32,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251806792] [2021-12-22 13:58:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251806792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:32,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:32,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:58:32,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308875102] [2021-12-22 13:58:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:32,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:58:32,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:58:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:32,140 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:58:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:32,885 INFO L93 Difference]: Finished difference Result 174 states and 241 transitions. [2021-12-22 13:58:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:58:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 134 [2021-12-22 13:58:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:32,887 INFO L225 Difference]: With dead ends: 174 [2021-12-22 13:58:32,887 INFO L226 Difference]: Without dead ends: 172 [2021-12-22 13:58:32,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:58:32,888 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 131 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:32,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1096 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:58:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-22 13:58:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2021-12-22 13:58:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.2) internal successors, (120), 103 states have internal predecessors, (120), 49 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-12-22 13:58:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2021-12-22 13:58:32,900 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 134 [2021-12-22 13:58:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:32,900 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2021-12-22 13:58:32,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-22 13:58:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2021-12-22 13:58:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-22 13:58:32,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:32,901 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:32,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:58:32,902 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1815865141, now seen corresponding path program 1 times [2021-12-22 13:58:32,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:32,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230779331] [2021-12-22 13:58:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:32,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:58:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 13:58:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:58:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:58:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 13:58:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:58:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 13:58:33,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:33,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230779331] [2021-12-22 13:58:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230779331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:33,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:33,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:58:33,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097232601] [2021-12-22 13:58:33,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:33,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:58:33,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:58:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:58:33,246 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:33,824 INFO L93 Difference]: Finished difference Result 298 states and 417 transitions. [2021-12-22 13:58:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:58:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 138 [2021-12-22 13:58:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:33,826 INFO L225 Difference]: With dead ends: 298 [2021-12-22 13:58:33,826 INFO L226 Difference]: Without dead ends: 174 [2021-12-22 13:58:33,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:33,827 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 116 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:33,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 536 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:58:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-22 13:58:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2021-12-22 13:58:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 107 states have internal predecessors, (125), 49 states have call successors, (49), 12 states have call predecessors, (49), 15 states have return successors, (60), 48 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 13:58:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 234 transitions. [2021-12-22 13:58:33,835 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 234 transitions. Word has length 138 [2021-12-22 13:58:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:33,836 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 234 transitions. [2021-12-22 13:58:33,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 234 transitions. [2021-12-22 13:58:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-22 13:58:33,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:33,840 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:33,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:58:33,841 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 421583768, now seen corresponding path program 1 times [2021-12-22 13:58:33,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:33,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414162641] [2021-12-22 13:58:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:33,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 13:58:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:58:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:58:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 13:58:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:58:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:58:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 13:58:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-22 13:58:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:58:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:58:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 13:58:34,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414162641] [2021-12-22 13:58:34,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414162641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466016569] [2021-12-22 13:58:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:34,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:34,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:34,256 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 13:58:34,290 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 13:58:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:58:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-22 13:58:34,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:58:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-22 13:58:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466016569] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:35,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:58:35,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 10 [2021-12-22 13:58:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865674558] [2021-12-22 13:58:35,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:35,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:58:35,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:58:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:35,066 INFO L87 Difference]: Start difference. First operand 168 states and 234 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:35,216 INFO L93 Difference]: Finished difference Result 303 states and 428 transitions. [2021-12-22 13:58:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:58:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 139 [2021-12-22 13:58:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:35,217 INFO L225 Difference]: With dead ends: 303 [2021-12-22 13:58:35,217 INFO L226 Difference]: Without dead ends: 174 [2021-12-22 13:58:35,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:35,218 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 5 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:35,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 404 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-22 13:58:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-12-22 13:58:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 109 states have internal predecessors, (128), 49 states have call successors, (49), 13 states have call predecessors, (49), 15 states have return successors, (60), 48 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 13:58:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2021-12-22 13:58:35,249 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 139 [2021-12-22 13:58:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:35,250 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2021-12-22 13:58:35,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-22 13:58:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2021-12-22 13:58:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-22 13:58:35,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:35,251 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:35,299 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 13:58:35,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:35,452 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1833604653, now seen corresponding path program 1 times [2021-12-22 13:58:35,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:35,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645901258] [2021-12-22 13:58:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:35,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 13:58:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 13:58:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 13:58:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 13:58:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:58:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 13:58:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:58:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 13:58:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:58:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 13:58:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:58:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:58:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 13:58:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:58:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:58:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-22 13:58:35,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645901258] [2021-12-22 13:58:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645901258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594650404] [2021-12-22 13:58:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:35,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:35,820 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 13:58:35,821 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 13:58:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2931 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 13:58:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:36,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-22 13:58:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 84 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-22 13:58:36,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:58:37,135 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-22 13:58:37,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 13:58:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-22 13:58:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594650404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:58:37,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:58:37,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 29 [2021-12-22 13:58:37,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704490973] [2021-12-22 13:58:37,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:58:37,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 13:58:37,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 13:58:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:58:37,163 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) [2021-12-22 13:58:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:40,344 INFO L93 Difference]: Finished difference Result 342 states and 477 transitions. [2021-12-22 13:58:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 13:58:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) Word has length 140 [2021-12-22 13:58:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:40,346 INFO L225 Difference]: With dead ends: 342 [2021-12-22 13:58:40,346 INFO L226 Difference]: Without dead ends: 175 [2021-12-22 13:58:40,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 13:58:40,347 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 180 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:40,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2786 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2840 Invalid, 0 Unknown, 216 Unchecked, 2.7s Time] [2021-12-22 13:58:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-22 13:58:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-12-22 13:58:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 109 states have internal predecessors, (127), 49 states have call successors, (49), 13 states have call predecessors, (49), 15 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-12-22 13:58:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-12-22 13:58:40,356 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 140 [2021-12-22 13:58:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-12-22 13:58:40,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 11 states have call successors, (56), 7 states have call predecessors, (56), 8 states have return successors, (53), 10 states have call predecessors, (53), 10 states have call successors, (53) [2021-12-22 13:58:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-12-22 13:58:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-22 13:58:40,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:40,358 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:40,381 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 13:58:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:40,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 688043480, now seen corresponding path program 1 times [2021-12-22 13:58:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:40,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22154083] [2021-12-22 13:58:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:40,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:58:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:58:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:58:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 13:58:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:58:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 13:58:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 13:58:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:58:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:58:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:58:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:58:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:58:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 13:58:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:40,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:58:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-22 13:58:41,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22154083] [2021-12-22 13:58:41,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22154083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942770736] [2021-12-22 13:58:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:41,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:41,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:41,012 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 13:58:41,037 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 13:58:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:58:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-22 13:58:41,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942770736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:41,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:41,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-12-22 13:58:41,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845767398] [2021-12-22 13:58:41,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:41,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:41,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:58:41,732 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-22 13:58:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:41,850 INFO L93 Difference]: Finished difference Result 320 states and 452 transitions. [2021-12-22 13:58:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:58:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 155 [2021-12-22 13:58:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:41,852 INFO L225 Difference]: With dead ends: 320 [2021-12-22 13:58:41,852 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 13:58:41,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:58:41,853 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 12 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:41,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1542 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:58:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 13:58:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-22 13:58:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 110 states have (on average 1.190909090909091) internal successors, (131), 114 states have internal predecessors, (131), 49 states have call successors, (49), 13 states have call predecessors, (49), 16 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-12-22 13:58:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 248 transitions. [2021-12-22 13:58:41,862 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 248 transitions. Word has length 155 [2021-12-22 13:58:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:41,862 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 248 transitions. [2021-12-22 13:58:41,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-22 13:58:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 248 transitions. [2021-12-22 13:58:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 13:58:41,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:41,864 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:41,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:58:42,086 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,SelfDestructingSolverStorable10 [2021-12-22 13:58:42,086 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash 880925085, now seen corresponding path program 1 times [2021-12-22 13:58:42,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:42,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879723116] [2021-12-22 13:58:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:42,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:58:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:58:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:58:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:58:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:58:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:58:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 13:58:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:58:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:58:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:58:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:58:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-22 13:58:42,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:42,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879723116] [2021-12-22 13:58:42,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879723116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124903205] [2021-12-22 13:58:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:42,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:42,480 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 13:58:42,519 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 13:58:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:58:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-22 13:58:43,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:43,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124903205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:43,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:43,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-22 13:58:43,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368997064] [2021-12-22 13:58:43,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:43,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:58:43,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:58:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:58:43,224 INFO L87 Difference]: Start difference. First operand 176 states and 248 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 13:58:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:43,468 INFO L93 Difference]: Finished difference Result 325 states and 475 transitions. [2021-12-22 13:58:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:58:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2021-12-22 13:58:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:43,470 INFO L225 Difference]: With dead ends: 325 [2021-12-22 13:58:43,470 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 13:58:43,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:58:43,471 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 17 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:43,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 711 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2021-12-22 13:58:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 13:58:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-22 13:58:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 114 states have internal predecessors, (130), 49 states have call successors, (49), 13 states have call predecessors, (49), 16 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-12-22 13:58:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 247 transitions. [2021-12-22 13:58:43,480 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 247 transitions. Word has length 157 [2021-12-22 13:58:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 247 transitions. [2021-12-22 13:58:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 13:58:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 247 transitions. [2021-12-22 13:58:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 13:58:43,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:43,483 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:43,525 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 13:58:43,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:43,701 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -401247201, now seen corresponding path program 1 times [2021-12-22 13:58:43,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:43,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536293979] [2021-12-22 13:58:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:43,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:58:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:58:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:58:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:58:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:58:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:58:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 13:58:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:58:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:58:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:58:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:58:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-22 13:58:43,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536293979] [2021-12-22 13:58:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536293979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796601426] [2021-12-22 13:58:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:43,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:44,011 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 13:58:44,014 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 13:58:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-22 13:58:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:45,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-22 13:58:45,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-22 13:58:45,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-22 13:58:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-22 13:58:45,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:45,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796601426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:45,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:45,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 19 [2021-12-22 13:58:45,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101468152] [2021-12-22 13:58:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:45,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:58:45,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:58:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:58:45,845 INFO L87 Difference]: Start difference. First operand 176 states and 247 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 13:58:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:50,159 INFO L93 Difference]: Finished difference Result 385 states and 564 transitions. [2021-12-22 13:58:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:58:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 157 [2021-12-22 13:58:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:50,161 INFO L225 Difference]: With dead ends: 385 [2021-12-22 13:58:50,161 INFO L226 Difference]: Without dead ends: 247 [2021-12-22 13:58:50,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=137, Invalid=618, Unknown=1, NotChecked=0, Total=756 [2021-12-22 13:58:50,162 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 284 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:50,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1179 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1952 Invalid, 0 Unknown, 227 Unchecked, 1.8s Time] [2021-12-22 13:58:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-22 13:58:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 197. [2021-12-22 13:58:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 125 states have (on average 1.168) internal successors, (146), 129 states have internal predecessors, (146), 53 states have call successors, (53), 14 states have call predecessors, (53), 18 states have return successors, (82), 53 states have call predecessors, (82), 52 states have call successors, (82) [2021-12-22 13:58:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 281 transitions. [2021-12-22 13:58:50,173 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 281 transitions. Word has length 157 [2021-12-22 13:58:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:50,173 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 281 transitions. [2021-12-22 13:58:50,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 13:58:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 281 transitions. [2021-12-22 13:58:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 13:58:50,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:50,175 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:50,197 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 13:58:50,395 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,SelfDestructingSolverStorable12 [2021-12-22 13:58:50,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1843311197, now seen corresponding path program 1 times [2021-12-22 13:58:50,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294095314] [2021-12-22 13:58:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:50,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:58:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:58:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:58:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:58:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:58:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-22 13:58:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:58:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:58:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-22 13:58:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-22 13:58:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:58:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:58:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-22 13:58:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-22 13:58:50,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294095314] [2021-12-22 13:58:50,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294095314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680059851] [2021-12-22 13:58:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:50,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:50,590 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 13:58:50,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:58:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:58:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-22 13:58:51,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:58:51,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680059851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:51,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:58:51,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-22 13:58:51,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596766458] [2021-12-22 13:58:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:51,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:58:51,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:58:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:58:51,261 INFO L87 Difference]: Start difference. First operand 197 states and 281 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 13:58:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:51,282 INFO L93 Difference]: Finished difference Result 343 states and 499 transitions. [2021-12-22 13:58:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:58:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2021-12-22 13:58:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:51,283 INFO L225 Difference]: With dead ends: 343 [2021-12-22 13:58:51,283 INFO L226 Difference]: Without dead ends: 185 [2021-12-22 13:58:51,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:58:51,285 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 6 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:51,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 604 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:58:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-22 13:58:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-12-22 13:58:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 119 states have internal predecessors, (134), 49 states have call successors, (49), 14 states have call predecessors, (49), 17 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-12-22 13:58:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 251 transitions. [2021-12-22 13:58:51,293 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 251 transitions. Word has length 157 [2021-12-22 13:58:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:51,293 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 251 transitions. [2021-12-22 13:58:51,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 13:58:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 251 transitions. [2021-12-22 13:58:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 13:58:51,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:51,294 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:51,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 13:58:51,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:58:51,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1119511963, now seen corresponding path program 1 times [2021-12-22 13:58:51,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:51,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391328320] [2021-12-22 13:58:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:51,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 13:58:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:58:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:58:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 13:58:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:58:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 13:58:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:58:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:58:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 13:58:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:58:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:58:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:58:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 13:58:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:58:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-22 13:58:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 13:58:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-22 13:58:51,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391328320] [2021-12-22 13:58:51,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391328320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:58:51,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:58:51,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:58:51,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176705899] [2021-12-22 13:58:51,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:58:51,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:58:51,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:58:51,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:58:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:58:51,997 INFO L87 Difference]: Start difference. First operand 182 states and 251 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-12-22 13:58:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:58:52,849 INFO L93 Difference]: Finished difference Result 339 states and 475 transitions. [2021-12-22 13:58:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:58:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 164 [2021-12-22 13:58:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:58:52,850 INFO L225 Difference]: With dead ends: 339 [2021-12-22 13:58:52,850 INFO L226 Difference]: Without dead ends: 185 [2021-12-22 13:58:52,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:58:52,852 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 186 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:58:52,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 663 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:58:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-22 13:58:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-12-22 13:58:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 119 states have internal predecessors, (133), 49 states have call successors, (49), 14 states have call predecessors, (49), 17 states have return successors, (68), 48 states have call predecessors, (68), 48 states have call successors, (68) [2021-12-22 13:58:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-12-22 13:58:52,861 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 164 [2021-12-22 13:58:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:58:52,862 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-12-22 13:58:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-12-22 13:58:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-12-22 13:58:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-22 13:58:52,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:58:52,863 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:58:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:58:52,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:58:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:58:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash 897405012, now seen corresponding path program 1 times [2021-12-22 13:58:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:58:52,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461849343] [2021-12-22 13:58:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:52,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:58:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:58:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:58:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:58:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 13:58:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:58:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:58:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:58:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:58:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:58:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:58:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:58:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 13:58:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:58:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 13:58:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 13:58:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:58:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:58:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 13:58:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-22 13:58:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-22 13:58:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-22 13:58:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-22 13:58:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-22 13:58:53,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:58:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461849343] [2021-12-22 13:58:53,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461849343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:58:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354043909] [2021-12-22 13:58:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:58:53,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:58:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:58:53,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:58:53,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:58:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:58:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 3070 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-22 13:58:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:58:53,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:58:53,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 13:58:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:58:53,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 13:58:53,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 13:58:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:58:54,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 13:58:54,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 13:58:54,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-12-22 13:58:54,959 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 13:58:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 13:58:55,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:58:55,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:58:55,321 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-22 13:58:55,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-22 13:58:55,362 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2809 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_2809) |c_#memory_int|)) is different from true [2021-12-22 13:58:55,366 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2811 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_2811) |c_#memory_int|)) is different from true [2021-12-22 13:58:55,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:58:57,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:59:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 165 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 2 not checked. [2021-12-22 13:59:12,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:59:12,816 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2812 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#dest_copy~0#1.base| v_ArrVal_2812) |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#cur~3#1.base|) |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#cur~3#1.offset|) 18446744073709551616) 0))) is different from false [2021-12-22 13:59:12,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354043909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:12,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:59:12,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 32] total 37 [2021-12-22 13:59:12,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522778160] [2021-12-22 13:59:12,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 13:59:12,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 13:59:12,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:59:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 13:59:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1583, Unknown=4, NotChecked=246, Total=1980 [2021-12-22 13:59:12,831 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 37 states, 36 states have (on average 4.055555555555555) internal successors, (146), 32 states have internal predecessors, (146), 12 states have call successors, (49), 12 states have call predecessors, (49), 12 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2021-12-22 13:59:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:59:22,054 INFO L93 Difference]: Finished difference Result 350 states and 480 transitions. [2021-12-22 13:59:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:59:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.055555555555555) internal successors, (146), 32 states have internal predecessors, (146), 12 states have call successors, (49), 12 states have call predecessors, (49), 12 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) Word has length 175 [2021-12-22 13:59:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:59:22,056 INFO L225 Difference]: With dead ends: 350 [2021-12-22 13:59:22,056 INFO L226 Difference]: Without dead ends: 207 [2021-12-22 13:59:22,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 239 SyntacticMatches, 25 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=245, Invalid=2838, Unknown=9, NotChecked=330, Total=3422 [2021-12-22 13:59:22,058 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 108 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 918 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:59:22,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1272 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 472 Invalid, 0 Unknown, 918 Unchecked, 0.6s Time] [2021-12-22 13:59:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-22 13:59:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2021-12-22 13:59:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 133 states have internal predecessors, (151), 49 states have call successors, (49), 17 states have call predecessors, (49), 19 states have return successors, (59), 48 states have call predecessors, (59), 48 states have call successors, (59) [2021-12-22 13:59:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 259 transitions. [2021-12-22 13:59:22,068 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 259 transitions. Word has length 175 [2021-12-22 13:59:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:59:22,068 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 259 transitions. [2021-12-22 13:59:22,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.055555555555555) internal successors, (146), 32 states have internal predecessors, (146), 12 states have call successors, (49), 12 states have call predecessors, (49), 12 states have return successors, (46), 12 states have call predecessors, (46), 12 states have call successors, (46) [2021-12-22 13:59:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 259 transitions. [2021-12-22 13:59:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 13:59:22,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:59:22,069 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:59:22,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:59:22,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:59:22,291 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:59:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:59:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1285973107, now seen corresponding path program 2 times [2021-12-22 13:59:22,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:59:22,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253948672] [2021-12-22 13:59:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:59:22,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:59:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 13:59:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 13:59:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:59:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 13:59:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:59:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:59:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:59:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 13:59:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:59:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:59:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:59:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 13:59:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:59:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 13:59:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:59:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:59:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:59:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:59:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 13:59:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-22 13:59:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 13:59:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-22 13:59:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:59:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-22 13:59:22,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:59:22,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253948672] [2021-12-22 13:59:22,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253948672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:59:22,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127298576] [2021-12-22 13:59:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:59:22,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:59:22,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:59:22,680 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:59:22,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:59:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:59:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:59:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 3201 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-22 13:59:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:59:23,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:59:23,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 13:59:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:59:24,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 13:59:24,256 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 13:59:24,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 13:59:24,800 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-22 13:59:24,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-22 13:59:24,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:59:25,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 13:59:25,223 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-22 13:59:25,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-22 13:59:25,272 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3326 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_3326))) is different from true [2021-12-22 13:59:25,276 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3328 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_3328) |c_#memory_int|)) is different from true [2021-12-22 13:59:25,282 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3329 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memcpy_dest.base| v_ArrVal_3329) |c_#memory_int|)) is different from true [2021-12-22 13:59:25,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19