./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_buf_reserve_relative_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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:15:10,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:15:10,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:15:10,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:15:10,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:15:10,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:15:10,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:15:10,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:15:10,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:15:10,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:15:10,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:15:10,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:15:10,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:15:10,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:15:10,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:15:10,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:15:10,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:15:10,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:15:10,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:15:10,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:15:10,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:15:10,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:15:10,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:15:10,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:15:10,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:15:10,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:15:10,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:15:10,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:15:10,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:15:10,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:15:10,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:15:10,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:15:10,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:15:10,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:15:10,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:15:10,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:15:10,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:15:10,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:15:10,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:15:10,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:15:10,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:15:10,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:15:10,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:15:10,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:15:10,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:15:10,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:15:10,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:15:10,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:15:10,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:15:10,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:15:10,345 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:15:10,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:15:10,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:15:10,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:15:10,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:15:10,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:15:10,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:15:10,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:15:10,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:15:10,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:15:10,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:15:10,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:15:10,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:15:10,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:10,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:15:10,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:15:10,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:15:10,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:15:10,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:15:10,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:15:10,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:15:10,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:15:10,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2021-12-28 03:15:10,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:15:10,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:15:10,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:15:10,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:15:10,664 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:15:10,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-12-28 03:15:10,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e3a1d5c/0b248a8e3a934c249e71c0c38d64f941/FLAG761dd9f51 [2021-12-28 03:15:11,391 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:15:11,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-12-28 03:15:11,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e3a1d5c/0b248a8e3a934c249e71c0c38d64f941/FLAG761dd9f51 [2021-12-28 03:15:11,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e3a1d5c/0b248a8e3a934c249e71c0c38d64f941 [2021-12-28 03:15:11,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:15:11,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:15:11,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:11,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:15:11,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:15:11,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:11" (1/1) ... [2021-12-28 03:15:11,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca20648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:11, skipping insertion in model container [2021-12-28 03:15:11,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:11" (1/1) ... [2021-12-28 03:15:11,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:15:11,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:15:11,852 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_buf_reserve_relative_harness.i[4503,4516] [2021-12-28 03:15:11,858 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_buf_reserve_relative_harness.i[4563,4576] [2021-12-28 03:15:12,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,437 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,440 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,440 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,441 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,451 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,452 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:12,695 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:12,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:12,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:12,701 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:12,704 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:12,705 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:12,706 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:12,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:12,712 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:12,821 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:12,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,829 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,899 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,906 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:12,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:13,040 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:15:13,051 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_buf_reserve_relative_harness.i[4503,4516] [2021-12-28 03:15:13,052 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_buf_reserve_relative_harness.i[4563,4576] [2021-12-28 03:15:13,082 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,099 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,099 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,107 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,109 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,110 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,153 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:13,154 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:13,154 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:13,155 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:13,156 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:13,156 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:13,157 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:13,157 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:13,158 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:13,159 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:13,194 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:13,202 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,203 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:13,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:13,661 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:15:13,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13 WrapperNode [2021-12-28 03:15:13,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:13,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:13,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:15:13,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:15:13,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,859 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2021-12-28 03:15:13,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:13,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:15:13,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:15:13,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:15:13,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:15:13,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:15:13,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:15:13,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:15:13,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (1/1) ... [2021-12-28 03:15:13,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:14,043 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) [2021-12-28 03:15:14,065 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 [2021-12-28 03:15:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-28 03:15:14,084 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-28 03:15:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:15:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:15:14,084 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:15:14,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:15:14,085 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-28 03:15:14,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-28 03:15:14,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:15:14,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:15:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:15:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:15:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:15:14,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:15:14,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:15:14,088 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:15:14,088 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:15:14,088 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-12-28 03:15:14,088 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-12-28 03:15:14,089 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-28 03:15:14,089 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-28 03:15:14,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:15:14,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:15:14,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:15:14,090 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-12-28 03:15:14,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-12-28 03:15:14,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:15:14,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:15:14,091 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:15:14,091 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:15:14,091 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-12-28 03:15:14,091 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-12-28 03:15:14,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:15:14,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:15:14,344 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:15:14,345 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:15:15,456 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:15:15,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:15:15,462 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-28 03:15:15,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:15 BoogieIcfgContainer [2021-12-28 03:15:15,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:15:15,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:15:15,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:15:15,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:15:15,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:15:11" (1/3) ... [2021-12-28 03:15:15,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613562af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:15, skipping insertion in model container [2021-12-28 03:15:15,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:13" (2/3) ... [2021-12-28 03:15:15,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613562af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:15, skipping insertion in model container [2021-12-28 03:15:15,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:15" (3/3) ... [2021-12-28 03:15:15,474 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2021-12-28 03:15:15,479 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:15:15,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:15:15,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:15:15,545 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 [2021-12-28 03:15:15,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:15:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-28 03:15:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 03:15:15,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:15,572 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:15,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2021-12-28 03:15:15,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359849623] [2021-12-28 03:15:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:15,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:15:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:15:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:15:16,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:16,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359849623] [2021-12-28 03:15:16,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359849623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:16,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:15:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307910557] [2021-12-28 03:15:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:16,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:16,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:15:16,207 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:15:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:16,548 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2021-12-28 03:15:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-12-28 03:15:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:16,566 INFO L225 Difference]: With dead ends: 320 [2021-12-28 03:15:16,567 INFO L226 Difference]: Without dead ends: 165 [2021-12-28 03:15:16,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:16,581 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 122 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:16,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 333 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:15:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-28 03:15:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2021-12-28 03:15:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 03:15:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2021-12-28 03:15:16,633 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2021-12-28 03:15:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:16,635 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2021-12-28 03:15:16,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:15:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2021-12-28 03:15:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 03:15:16,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:16,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:16,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:15:16,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2021-12-28 03:15:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588337886] [2021-12-28 03:15:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:15:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 03:15:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:15:16,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588337886] [2021-12-28 03:15:16,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588337886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:16,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:16,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:15:16,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54150179] [2021-12-28 03:15:16,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:16,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:16,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:16,960 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:15:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:17,432 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2021-12-28 03:15:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-12-28 03:15:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:17,435 INFO L225 Difference]: With dead ends: 307 [2021-12-28 03:15:17,435 INFO L226 Difference]: Without dead ends: 168 [2021-12-28 03:15:17,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:17,437 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 202 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:17,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 525 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-28 03:15:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2021-12-28 03:15:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-28 03:15:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2021-12-28 03:15:17,451 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2021-12-28 03:15:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:17,452 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2021-12-28 03:15:17,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:15:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2021-12-28 03:15:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 03:15:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:17,454 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:17,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:15:17,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2021-12-28 03:15:17,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079309931] [2021-12-28 03:15:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:17,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:15:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:15:17,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:17,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079309931] [2021-12-28 03:15:17,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079309931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:17,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:17,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:15:17,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155878643] [2021-12-28 03:15:17,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:17,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:15:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:15:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:15:17,671 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:15:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:18,145 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2021-12-28 03:15:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2021-12-28 03:15:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:18,148 INFO L225 Difference]: With dead ends: 210 [2021-12-28 03:15:18,148 INFO L226 Difference]: Without dead ends: 172 [2021-12-28 03:15:18,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:15:18,149 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 125 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:18,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 699 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-28 03:15:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-12-28 03:15:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-28 03:15:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-28 03:15:18,163 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2021-12-28 03:15:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:18,164 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-28 03:15:18,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:15:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-28 03:15:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-28 03:15:18,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:18,166 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:18,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:15:18,167 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2021-12-28 03:15:18,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085625361] [2021-12-28 03:15:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:18,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:15:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:15:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:18,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085625361] [2021-12-28 03:15:18,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085625361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605368273] [2021-12-28 03:15:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:18,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:18,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:18,427 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) [2021-12-28 03:15:18,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:15:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 03:15:18,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:15:19,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:19,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605368273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:19,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:19,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-12-28 03:15:19,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952376219] [2021-12-28 03:15:19,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:19,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:15:19,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:15:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:15:19,069 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:19,104 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2021-12-28 03:15:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:15:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-12-28 03:15:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:19,106 INFO L225 Difference]: With dead ends: 204 [2021-12-28 03:15:19,106 INFO L226 Difference]: Without dead ends: 166 [2021-12-28 03:15:19,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:19,108 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:19,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1030 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-28 03:15:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-28 03:15:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-28 03:15:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-28 03:15:19,120 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2021-12-28 03:15:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:19,121 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-28 03:15:19,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-28 03:15:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 03:15:19,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:19,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:19,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:19,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:19,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2021-12-28 03:15:19,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106742128] [2021-12-28 03:15:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:19,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:15:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:15:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 03:15:19,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106742128] [2021-12-28 03:15:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106742128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:19,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:15:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019512124] [2021-12-28 03:15:19,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:19,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:15:19,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:15:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:19,660 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:20,335 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2021-12-28 03:15:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2021-12-28 03:15:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:20,337 INFO L225 Difference]: With dead ends: 181 [2021-12-28 03:15:20,337 INFO L226 Difference]: Without dead ends: 174 [2021-12-28 03:15:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:20,339 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 144 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:20,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 926 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:15:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-28 03:15:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-12-28 03:15:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-12-28 03:15:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2021-12-28 03:15:20,350 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2021-12-28 03:15:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:20,350 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2021-12-28 03:15:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2021-12-28 03:15:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 03:15:20,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:20,353 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:15:20,353 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2021-12-28 03:15:20,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170717126] [2021-12-28 03:15:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:15:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:15:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:15:20,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170717126] [2021-12-28 03:15:20,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170717126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:20,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:20,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:15:20,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033707469] [2021-12-28 03:15:20,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:20,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:20,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:20,664 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:21,215 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2021-12-28 03:15:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2021-12-28 03:15:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:21,218 INFO L225 Difference]: With dead ends: 347 [2021-12-28 03:15:21,218 INFO L226 Difference]: Without dead ends: 199 [2021-12-28 03:15:21,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:15:21,219 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 201 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:21,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 599 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:15:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-28 03:15:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2021-12-28 03:15:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-12-28 03:15:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2021-12-28 03:15:21,230 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2021-12-28 03:15:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2021-12-28 03:15:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2021-12-28 03:15:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 03:15:21,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:21,232 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:15:21,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2021-12-28 03:15:21,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56654317] [2021-12-28 03:15:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:21,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:15:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:15:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:21,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56654317] [2021-12-28 03:15:21,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56654317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049959980] [2021-12-28 03:15:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:21,744 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) [2021-12-28 03:15:21,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:15:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 03:15:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:22,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 03:15:22,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:15:22,493 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:15:22,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2021-12-28 03:15:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:15:22,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:22,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049959980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:22,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:22,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2021-12-28 03:15:22,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465509068] [2021-12-28 03:15:22,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:22,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:15:22,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:15:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:15:22,555 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 03:15:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:22,657 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2021-12-28 03:15:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2021-12-28 03:15:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:22,659 INFO L225 Difference]: With dead ends: 348 [2021-12-28 03:15:22,659 INFO L226 Difference]: Without dead ends: 188 [2021-12-28 03:15:22,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:15:22,660 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 22 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:22,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1492 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-12-28 03:15:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-28 03:15:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2021-12-28 03:15:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 133 states have (on average 1.255639097744361) internal successors, (167), 135 states have internal predecessors, (167), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (44), 37 states have call predecessors, (44), 37 states have call successors, (44) [2021-12-28 03:15:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 249 transitions. [2021-12-28 03:15:22,671 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 249 transitions. Word has length 68 [2021-12-28 03:15:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:22,671 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 249 transitions. [2021-12-28 03:15:22,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 03:15:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 249 transitions. [2021-12-28 03:15:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 03:15:22,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:22,673 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:22,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 03:15:22,887 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,SelfDestructingSolverStorable6 [2021-12-28 03:15:22,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash -631678396, now seen corresponding path program 1 times [2021-12-28 03:15:22,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30995612] [2021-12-28 03:15:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:22,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:15:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:15:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:15:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:15:23,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30995612] [2021-12-28 03:15:23,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30995612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516087060] [2021-12-28 03:15:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:23,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:23,059 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) [2021-12-28 03:15:23,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:15:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:15:23,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516087060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:23,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:23,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-28 03:15:23,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533560462] [2021-12-28 03:15:23,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:23,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:23,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:23,550 INFO L87 Difference]: Start difference. First operand 185 states and 249 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:23,576 INFO L93 Difference]: Finished difference Result 348 states and 477 transitions. [2021-12-28 03:15:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:23,576 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-28 03:15:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:23,578 INFO L225 Difference]: With dead ends: 348 [2021-12-28 03:15:23,578 INFO L226 Difference]: Without dead ends: 194 [2021-12-28 03:15:23,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:23,579 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 20 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:23,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 613 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-28 03:15:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2021-12-28 03:15:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 126 states have (on average 1.253968253968254) internal successors, (158), 127 states have internal predecessors, (158), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-28 03:15:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2021-12-28 03:15:23,587 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 68 [2021-12-28 03:15:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:23,588 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2021-12-28 03:15:23,588 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2021-12-28 03:15:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 03:15:23,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:23,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:23,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:23,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:23,804 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2021-12-28 03:15:23,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:23,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397493147] [2021-12-28 03:15:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:23,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:15:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:15:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:15:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 03:15:24,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397493147] [2021-12-28 03:15:24,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397493147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690136241] [2021-12-28 03:15:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:24,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:24,056 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) [2021-12-28 03:15:24,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:15:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:15:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:15:24,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690136241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:24,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:24,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-28 03:15:24,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505891225] [2021-12-28 03:15:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:24,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:24,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:15:24,609 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:15:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:24,719 INFO L93 Difference]: Finished difference Result 339 states and 467 transitions. [2021-12-28 03:15:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:15:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-12-28 03:15:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:24,721 INFO L225 Difference]: With dead ends: 339 [2021-12-28 03:15:24,721 INFO L226 Difference]: Without dead ends: 185 [2021-12-28 03:15:24,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:15:24,724 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:24,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1531 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-28 03:15:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-12-28 03:15:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 132 states have internal predecessors, (162), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-12-28 03:15:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-12-28 03:15:24,732 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 72 [2021-12-28 03:15:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:24,733 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-12-28 03:15:24,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:15:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-12-28 03:15:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:24,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:24,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:24,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 03:15:24,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:24,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2021-12-28 03:15:24,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:24,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699318819] [2021-12-28 03:15:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:24,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:15:25,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699318819] [2021-12-28 03:15:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699318819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536797084] [2021-12-28 03:15:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:25,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:25,139 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) [2021-12-28 03:15:25,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:15:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:25,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:25,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536797084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:25,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:25,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-28 03:15:25,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615307262] [2021-12-28 03:15:25,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:25,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:25,656 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:25,680 INFO L93 Difference]: Finished difference Result 346 states and 483 transitions. [2021-12-28 03:15:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-28 03:15:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:25,682 INFO L225 Difference]: With dead ends: 346 [2021-12-28 03:15:25,682 INFO L226 Difference]: Without dead ends: 185 [2021-12-28 03:15:25,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:25,683 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:25,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 606 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-28 03:15:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-12-28 03:15:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 132 states have internal predecessors, (160), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-12-28 03:15:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2021-12-28 03:15:25,691 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 74 [2021-12-28 03:15:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2021-12-28 03:15:25,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2021-12-28 03:15:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:25,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:25,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:25,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 03:15:25,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2021-12-28 03:15:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068883847] [2021-12-28 03:15:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:25,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:15:26,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:26,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068883847] [2021-12-28 03:15:26,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068883847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:26,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888937139] [2021-12-28 03:15:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:26,059 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) [2021-12-28 03:15:26,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:15:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 03:15:26,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:26,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888937139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:26,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:26,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-28 03:15:26,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275226288] [2021-12-28 03:15:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:26,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:26,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:26,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:26,566 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:26,591 INFO L93 Difference]: Finished difference Result 352 states and 498 transitions. [2021-12-28 03:15:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-28 03:15:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:26,593 INFO L225 Difference]: With dead ends: 352 [2021-12-28 03:15:26,593 INFO L226 Difference]: Without dead ends: 191 [2021-12-28 03:15:26,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:26,594 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:26,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-28 03:15:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-12-28 03:15:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2021-12-28 03:15:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2021-12-28 03:15:26,606 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 74 [2021-12-28 03:15:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2021-12-28 03:15:26,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:15:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2021-12-28 03:15:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:26,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:26,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:26,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:26,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:26,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:26,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2021-12-28 03:15:26,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:26,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947763159] [2021-12-28 03:15:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:15:27,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947763159] [2021-12-28 03:15:27,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947763159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766104684] [2021-12-28 03:15:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:27,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:27,576 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) [2021-12-28 03:15:27,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:15:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-28 03:15:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:28,080 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 [2021-12-28 03:15:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:15:28,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:29,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766104684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:29,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:29,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 28 [2021-12-28 03:15:29,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765250251] [2021-12-28 03:15:29,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:29,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-28 03:15:29,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-28 03:15:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-12-28 03:15:29,120 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-28 03:15:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:31,009 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2021-12-28 03:15:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 03:15:31,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-12-28 03:15:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:31,011 INFO L225 Difference]: With dead ends: 263 [2021-12-28 03:15:31,011 INFO L226 Difference]: Without dead ends: 235 [2021-12-28 03:15:31,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 03:15:31,012 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 430 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:31,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1417 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1882 Invalid, 0 Unknown, 479 Unchecked, 1.3s Time] [2021-12-28 03:15:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-28 03:15:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-12-28 03:15:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 39 states have call successors, (39), 15 states have call predecessors, (39), 16 states have return successors, (51), 37 states have call predecessors, (51), 38 states have call successors, (51) [2021-12-28 03:15:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2021-12-28 03:15:31,030 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 74 [2021-12-28 03:15:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:31,030 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2021-12-28 03:15:31,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.62962962962963) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-28 03:15:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2021-12-28 03:15:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:31,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:31,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:31,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:31,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:31,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2021-12-28 03:15:31,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071377303] [2021-12-28 03:15:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:31,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 03:15:31,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071377303] [2021-12-28 03:15:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071377303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712133708] [2021-12-28 03:15:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:31,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:31,658 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) [2021-12-28 03:15:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:15:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-28 03:15:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:15:32,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:33,567 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-28 03:15:33,568 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 39 treesize of output 1 [2021-12-28 03:15:33,763 INFO L353 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-28 03:15:33,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-12-28 03:15:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712133708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:33,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:33,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2021-12-28 03:15:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301727475] [2021-12-28 03:15:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-28 03:15:33,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-28 03:15:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 03:15:33,890 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-28 03:15:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:36,034 INFO L93 Difference]: Finished difference Result 305 states and 410 transitions. [2021-12-28 03:15:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 03:15:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2021-12-28 03:15:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:36,037 INFO L225 Difference]: With dead ends: 305 [2021-12-28 03:15:36,037 INFO L226 Difference]: Without dead ends: 293 [2021-12-28 03:15:36,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-12-28 03:15:36,042 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 370 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:36,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1386 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1594 Invalid, 0 Unknown, 340 Unchecked, 1.2s Time] [2021-12-28 03:15:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-28 03:15:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2021-12-28 03:15:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 191 states have internal predecessors, (220), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-12-28 03:15:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2021-12-28 03:15:36,063 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 74 [2021-12-28 03:15:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:36,063 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2021-12-28 03:15:36,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 32 states have internal predecessors, (122), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-28 03:15:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2021-12-28 03:15:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:36,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:36,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:36,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:36,279 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,SelfDestructingSolverStorable12 [2021-12-28 03:15:36,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1526436777, now seen corresponding path program 1 times [2021-12-28 03:15:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:36,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971162040] [2021-12-28 03:15:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:36,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 03:15:36,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:36,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971162040] [2021-12-28 03:15:36,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971162040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:36,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:36,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:15:36,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60126503] [2021-12-28 03:15:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:36,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:36,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:36,512 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:36,922 INFO L93 Difference]: Finished difference Result 466 states and 627 transitions. [2021-12-28 03:15:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 74 [2021-12-28 03:15:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:36,924 INFO L225 Difference]: With dead ends: 466 [2021-12-28 03:15:36,924 INFO L226 Difference]: Without dead ends: 265 [2021-12-28 03:15:36,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:15:36,925 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 164 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:36,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 510 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-28 03:15:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2021-12-28 03:15:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 185 states have (on average 1.162162162162162) internal successors, (215), 189 states have internal predecessors, (215), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-12-28 03:15:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2021-12-28 03:15:36,940 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 74 [2021-12-28 03:15:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:36,940 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2021-12-28 03:15:36,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2021-12-28 03:15:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 03:15:36,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:36,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:36,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:15:36,942 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2021-12-28 03:15:36,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:36,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674187975] [2021-12-28 03:15:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:36,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 03:15:37,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:37,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674187975] [2021-12-28 03:15:37,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674187975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:37,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588514195] [2021-12-28 03:15:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:37,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:37,831 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) [2021-12-28 03:15:37,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:15:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 03:15:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:38,287 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 [2021-12-28 03:15:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:15:39,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:39,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588514195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:39,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:39,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 33 [2021-12-28 03:15:39,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375058783] [2021-12-28 03:15:39,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:39,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:15:39,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:15:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 03:15:39,991 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-28 03:15:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:42,505 INFO L93 Difference]: Finished difference Result 278 states and 361 transitions. [2021-12-28 03:15:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 03:15:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2021-12-28 03:15:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:42,507 INFO L225 Difference]: With dead ends: 278 [2021-12-28 03:15:42,507 INFO L226 Difference]: Without dead ends: 266 [2021-12-28 03:15:42,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=2279, Unknown=0, NotChecked=0, Total=2756 [2021-12-28 03:15:42,509 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 356 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:42,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1670 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2172 Invalid, 0 Unknown, 638 Unchecked, 1.6s Time] [2021-12-28 03:15:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-28 03:15:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2021-12-28 03:15:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 180 states have internal predecessors, (204), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (68), 42 states have call predecessors, (68), 43 states have call successors, (68) [2021-12-28 03:15:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2021-12-28 03:15:42,536 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 74 [2021-12-28 03:15:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:42,537 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2021-12-28 03:15:42,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.96875) internal successors, (127), 31 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-28 03:15:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2021-12-28 03:15:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 03:15:42,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:42,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-28 03:15:42,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:42,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:15:42,764 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2021-12-28 03:15:42,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:42,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549588422] [2021-12-28 03:15:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:42,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:15:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:15:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:15:43,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:43,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549588422] [2021-12-28 03:15:43,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549588422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:43,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014776664] [2021-12-28 03:15:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:43,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:43,014 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) [2021-12-28 03:15:43,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:15:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:15:43,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:15:43,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014776664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:43,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:43,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-28 03:15:43,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053218440] [2021-12-28 03:15:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:15:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:15:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:15:43,590 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:43,619 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2021-12-28 03:15:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:43,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2021-12-28 03:15:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:43,622 INFO L225 Difference]: With dead ends: 299 [2021-12-28 03:15:43,622 INFO L226 Difference]: Without dead ends: 245 [2021-12-28 03:15:43,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:15:43,623 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:43,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 811 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-28 03:15:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-12-28 03:15:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 184 states have internal predecessors, (208), 44 states have call successors, (44), 17 states have call predecessors, (44), 21 states have return successors, (69), 43 states have call predecessors, (69), 43 states have call successors, (69) [2021-12-28 03:15:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 321 transitions. [2021-12-28 03:15:43,642 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 321 transitions. Word has length 78 [2021-12-28 03:15:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:43,642 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 321 transitions. [2021-12-28 03:15:43,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 321 transitions. [2021-12-28 03:15:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 03:15:43,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:43,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:43,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:43,859 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,SelfDestructingSolverStorable15 [2021-12-28 03:15:43,859 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2021-12-28 03:15:43,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885806955] [2021-12-28 03:15:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:43,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:15:44,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885806955] [2021-12-28 03:15:44,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885806955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:44,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:44,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:15:44,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840733918] [2021-12-28 03:15:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:44,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:15:44,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:15:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:15:44,083 INFO L87 Difference]: Start difference. First operand 245 states and 321 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:44,810 INFO L93 Difference]: Finished difference Result 262 states and 343 transitions. [2021-12-28 03:15:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:15:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2021-12-28 03:15:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:44,812 INFO L225 Difference]: With dead ends: 262 [2021-12-28 03:15:44,812 INFO L226 Difference]: Without dead ends: 238 [2021-12-28 03:15:44,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:15:44,813 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:44,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1125 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:15:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-28 03:15:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-12-28 03:15:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 167 states have (on average 1.155688622754491) internal successors, (193), 170 states have internal predecessors, (193), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (64), 41 states have call predecessors, (64), 40 states have call successors, (64) [2021-12-28 03:15:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2021-12-28 03:15:44,827 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 76 [2021-12-28 03:15:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:44,827 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2021-12-28 03:15:44,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 03:15:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2021-12-28 03:15:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 03:15:44,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:44,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:44,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 03:15:44,830 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2021-12-28 03:15:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900317849] [2021-12-28 03:15:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:44,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:15:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 03:15:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900317849] [2021-12-28 03:15:45,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900317849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:45,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:45,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-28 03:15:45,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980261177] [2021-12-28 03:15:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:45,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 03:15:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 03:15:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:15:45,430 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:15:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:46,737 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2021-12-28 03:15:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 03:15:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-12-28 03:15:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:46,739 INFO L225 Difference]: With dead ends: 245 [2021-12-28 03:15:46,739 INFO L226 Difference]: Without dead ends: 210 [2021-12-28 03:15:46,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-12-28 03:15:46,740 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 228 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:46,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1292 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 03:15:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-28 03:15:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-12-28 03:15:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (56), 36 states have call predecessors, (56), 35 states have call successors, (56) [2021-12-28 03:15:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 252 transitions. [2021-12-28 03:15:46,750 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 252 transitions. Word has length 76 [2021-12-28 03:15:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:46,750 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 252 transitions. [2021-12-28 03:15:46,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:15:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 252 transitions. [2021-12-28 03:15:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 03:15:46,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:46,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:46,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 03:15:46,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash -907054334, now seen corresponding path program 1 times [2021-12-28 03:15:46,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70714011] [2021-12-28 03:15:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:46,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:15:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 03:15:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:15:46,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70714011] [2021-12-28 03:15:46,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70714011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201415587] [2021-12-28 03:15:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:46,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:46,992 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) [2021-12-28 03:15:47,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:15:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:15:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 03:15:47,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:47,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201415587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:47,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:47,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-28 03:15:47,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044763611] [2021-12-28 03:15:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:47,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:47,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:15:47,607 INFO L87 Difference]: Start difference. First operand 189 states and 252 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-28 03:15:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:47,782 INFO L93 Difference]: Finished difference Result 352 states and 473 transitions. [2021-12-28 03:15:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:15:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2021-12-28 03:15:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:47,784 INFO L225 Difference]: With dead ends: 352 [2021-12-28 03:15:47,784 INFO L226 Difference]: Without dead ends: 192 [2021-12-28 03:15:47,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:15:47,786 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 286 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:47,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 667 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-28 03:15:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-12-28 03:15:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.173913043478261) internal successors, (162), 142 states have internal predecessors, (162), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-12-28 03:15:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2021-12-28 03:15:47,798 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 84 [2021-12-28 03:15:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2021-12-28 03:15:47,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-28 03:15:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2021-12-28 03:15:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-28 03:15:47,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:47,803 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:15:47,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:48,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:48,019 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2021-12-28 03:15:48,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892004030] [2021-12-28 03:15:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:48,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:15:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:15:48,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892004030] [2021-12-28 03:15:48,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892004030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:48,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:48,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:15:48,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202432035] [2021-12-28 03:15:48,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:48,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:15:48,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:15:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:48,212 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:15:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:48,692 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-12-28 03:15:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:15:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2021-12-28 03:15:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:48,694 INFO L225 Difference]: With dead ends: 268 [2021-12-28 03:15:48,694 INFO L226 Difference]: Without dead ends: 206 [2021-12-28 03:15:48,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:15:48,695 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 132 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:48,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 736 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-28 03:15:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2021-12-28 03:15:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 143 states have internal predecessors, (163), 36 states have call successors, (36), 13 states have call predecessors, (36), 17 states have return successors, (60), 36 states have call predecessors, (60), 35 states have call successors, (60) [2021-12-28 03:15:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2021-12-28 03:15:48,707 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 89 [2021-12-28 03:15:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:48,708 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2021-12-28 03:15:48,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:15:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2021-12-28 03:15:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-28 03:15:48,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:48,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-28 03:15:48,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 03:15:48,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2021-12-28 03:15:48,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143153483] [2021-12-28 03:15:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:48,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 03:15:48,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:48,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143153483] [2021-12-28 03:15:48,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143153483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:48,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:48,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 03:15:48,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088334822] [2021-12-28 03:15:48,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:48,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:15:48,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:15:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:15:48,962 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:15:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:49,599 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-12-28 03:15:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2021-12-28 03:15:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:49,601 INFO L225 Difference]: With dead ends: 208 [2021-12-28 03:15:49,601 INFO L226 Difference]: Without dead ends: 206 [2021-12-28 03:15:49,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:49,602 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:49,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 902 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:15:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-28 03:15:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2021-12-28 03:15:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 146 states have internal predecessors, (166), 37 states have call successors, (37), 14 states have call predecessors, (37), 18 states have return successors, (61), 37 states have call predecessors, (61), 36 states have call successors, (61) [2021-12-28 03:15:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2021-12-28 03:15:49,613 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 96 [2021-12-28 03:15:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:49,613 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2021-12-28 03:15:49,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:15:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2021-12-28 03:15:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-28 03:15:49,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:49,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:49,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 03:15:49,615 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2021-12-28 03:15:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:49,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111455265] [2021-12-28 03:15:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 03:15:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 03:15:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 03:15:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111455265] [2021-12-28 03:15:49,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111455265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729487794] [2021-12-28 03:15:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:49,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:49,860 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) [2021-12-28 03:15:49,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:15:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 03:15:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 03:15:50,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:50,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729487794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:50,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:50,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-12-28 03:15:50,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531108026] [2021-12-28 03:15:50,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:50,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:15:50,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:15:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:15:50,519 INFO L87 Difference]: Start difference. First operand 198 states and 264 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-28 03:15:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:50,744 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2021-12-28 03:15:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:50,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2021-12-28 03:15:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:50,746 INFO L225 Difference]: With dead ends: 335 [2021-12-28 03:15:50,746 INFO L226 Difference]: Without dead ends: 199 [2021-12-28 03:15:50,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-12-28 03:15:50,748 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 324 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:50,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 781 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:15:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-28 03:15:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-12-28 03:15:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 140 states have (on average 1.1642857142857144) internal successors, (163), 143 states have internal predecessors, (163), 37 states have call successors, (37), 14 states have call predecessors, (37), 17 states have return successors, (57), 37 states have call predecessors, (57), 36 states have call successors, (57) [2021-12-28 03:15:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2021-12-28 03:15:50,762 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 97 [2021-12-28 03:15:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2021-12-28 03:15:50,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-28 03:15:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2021-12-28 03:15:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-28 03:15:50,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:50,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-12-28 03:15:50,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-28 03:15:50,991 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,SelfDestructingSolverStorable21 [2021-12-28 03:15:50,991 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2021-12-28 03:15:50,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277814471] [2021-12-28 03:15:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:50,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 03:15:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 03:15:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 03:15:51,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277814471] [2021-12-28 03:15:51,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277814471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972143037] [2021-12-28 03:15:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:51,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:51,420 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) [2021-12-28 03:15:51,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:15:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 03:15:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:51,939 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 11 treesize of output 7 [2021-12-28 03:15:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:15:52,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972143037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:52,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:15:52,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-12-28 03:15:52,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242549697] [2021-12-28 03:15:52,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:52,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 03:15:52,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 03:15:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-12-28 03:15:52,947 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-28 03:15:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:55,655 INFO L93 Difference]: Finished difference Result 573 states and 836 transitions. [2021-12-28 03:15:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-28 03:15:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-12-28 03:15:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:55,658 INFO L225 Difference]: With dead ends: 573 [2021-12-28 03:15:55,659 INFO L226 Difference]: Without dead ends: 407 [2021-12-28 03:15:55,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2021-12-28 03:15:55,661 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 303 mSDsluCounter, 3652 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 4016 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:55,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 4016 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2976 Invalid, 0 Unknown, 1015 Unchecked, 1.9s Time] [2021-12-28 03:15:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-28 03:15:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 221. [2021-12-28 03:15:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 163 states have (on average 1.1595092024539877) internal successors, (189), 168 states have internal predecessors, (189), 37 states have call successors, (37), 15 states have call predecessors, (37), 20 states have return successors, (62), 37 states have call predecessors, (62), 36 states have call successors, (62) [2021-12-28 03:15:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2021-12-28 03:15:55,678 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 100 [2021-12-28 03:15:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:55,679 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2021-12-28 03:15:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-28 03:15:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2021-12-28 03:15:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 03:15:55,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:55,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:55,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-28 03:15:55,904 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195624, now seen corresponding path program 1 times [2021-12-28 03:15:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538868163] [2021-12-28 03:15:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:55,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:15:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:15:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:15:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:15:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:15:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 03:15:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 03:15:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 03:15:56,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538868163] [2021-12-28 03:15:56,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538868163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981816459] [2021-12-28 03:15:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:56,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:56,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:15:56,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:15:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-28 03:15:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:15:57,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:03,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981816459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:03,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:03,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-12-28 03:16:03,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365596526] [2021-12-28 03:16:03,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:03,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:16:03,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:16:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=887, Unknown=2, NotChecked=0, Total=992 [2021-12-28 03:16:03,513 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 19 states have internal predecessors, (130), 6 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19)