./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_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 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:42:09,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:42:09,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:42:09,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:42:09,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:42:09,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:42:09,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:42:09,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:42:09,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:42:09,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:42:09,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:42:09,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:42:09,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:42:09,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:42:09,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:42:09,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:42:09,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:42:09,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:42:09,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:42:09,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:42:09,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:42:09,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:42:09,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:42:09,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:42:09,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:42:09,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:42:09,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:42:09,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:42:09,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:42:09,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:42:09,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:42:09,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:42:09,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:42:09,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:42:09,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:42:09,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:42:09,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:42:09,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:42:09,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:42:09,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:42:09,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:42:09,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:42:09,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:42:09,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:42:09,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:42:09,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:42:09,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:42:09,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:42:09,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:42:09,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:42:09,374 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:42:09,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:42:09,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:42:09,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:42:09,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:42:09,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:42:09,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:42:09,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:42:09,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:42:09,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:42:09,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:42:09,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:42:09,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:42:09,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:42:09,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:42:09,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:42:09,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:42:09,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:42:09,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f [2021-11-16 20:42:09,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:42:09,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:42:09,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:42:09,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:42:09,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:42:09,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2021-11-16 20:42:09,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669d668bb/2838c8b2db0b456aab517ce3dda3e733/FLAG07ec99db6 [2021-11-16 20:42:10,383 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:42:10,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2021-11-16 20:42:10,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669d668bb/2838c8b2db0b456aab517ce3dda3e733/FLAG07ec99db6 [2021-11-16 20:42:10,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/669d668bb/2838c8b2db0b456aab517ce3dda3e733 [2021-11-16 20:42:10,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:42:10,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:42:10,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:42:10,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:42:10,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:42:10,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:42:10" (1/1) ... [2021-11-16 20:42:10,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b7a7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:10, skipping insertion in model container [2021-11-16 20:42:10,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:42:10" (1/1) ... [2021-11-16 20:42:10,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:42:10,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:42:10,852 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_write_from_whole_string_harness.i[4510,4523] [2021-11-16 20:42:10,859 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_write_from_whole_string_harness.i[4570,4583] [2021-11-16 20:42:10,882 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:42:10,888 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:42:11,545 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,545 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,553 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,554 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,556 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,574 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,574 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,576 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,576 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,578 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,578 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,579 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,579 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:11,876 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:42:11,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:42:11,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:42:11,881 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:42:11,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:42:11,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:42:11,884 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:42:11,912 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:42:11,912 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:42:11,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:42:12,100 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:42:12,131 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,142 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,218 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,219 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,310 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:42:12,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:42:12,375 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_write_from_whole_string_harness.i[4510,4523] [2021-11-16 20:42:12,375 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_write_from_whole_string_harness.i[4570,4583] [2021-11-16 20:42:12,377 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:42:12,378 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:42:12,415 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,416 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,416 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,416 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,417 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,424 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,425 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,426 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,426 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,427 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,428 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,428 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,428 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,461 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:42:12,462 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:42:12,462 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:42:12,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:42:12,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:42:12,464 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:42:12,464 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:42:12,465 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:42:12,465 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:42:12,465 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:42:12,486 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:42:12,496 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,500 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,538 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,538 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:42:12,581 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:42:12,796 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:42:12,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12 WrapperNode [2021-11-16 20:42:12,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:42:12,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:42:12,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:42:12,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:42:12,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:12,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:12,986 INFO L137 Inliner]: procedures = 697, calls = 3055, calls flagged for inlining = 70, calls inlined = 10, statements flattened = 963 [2021-11-16 20:42:12,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:42:12,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:42:12,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:42:12,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:42:12,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:12,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:42:13,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:42:13,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:42:13,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:42:13,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (1/1) ... [2021-11-16 20:42:13,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:42:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:42:13,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:42:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:42:13,166 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-16 20:42:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-16 20:42:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-16 20:42:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-16 20:42:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-16 20:42:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-16 20:42:13,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:42:13,168 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:42:13,168 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:42:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-16 20:42:13,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-16 20:42:13,170 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:42:13,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:42:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:42:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:42:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:42:13,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:42:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:42:13,171 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:42:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:42:13,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:42:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-16 20:42:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-16 20:42:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2021-11-16 20:42:13,172 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2021-11-16 20:42:13,172 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:42:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:42:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:42:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:42:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-16 20:42:13,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-16 20:42:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:42:13,173 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:42:13,174 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:42:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 20:42:13,174 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 20:42:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:42:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-16 20:42:13,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:42:13,445 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:42:13,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:42:14,539 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:42:14,546 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:42:14,546 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-16 20:42:14,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:42:14 BoogieIcfgContainer [2021-11-16 20:42:14,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:42:14,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:42:14,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:42:14,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:42:14,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:42:10" (1/3) ... [2021-11-16 20:42:14,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c17db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:42:14, skipping insertion in model container [2021-11-16 20:42:14,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:42:12" (2/3) ... [2021-11-16 20:42:14,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155c17db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:42:14, skipping insertion in model container [2021-11-16 20:42:14,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:42:14" (3/3) ... [2021-11-16 20:42:14,556 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_from_whole_string_harness.i [2021-11-16 20:42:14,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:42:14,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:42:14,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:42:14,603 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:42:14,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:42:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 121 states have internal predecessors, (152), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-16 20:42:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-16 20:42:14,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:14,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:14,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1892676938, now seen corresponding path program 1 times [2021-11-16 20:42:14,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:14,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376806445] [2021-11-16 20:42:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:14,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:42:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:42:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:42:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:15,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:15,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376806445] [2021-11-16 20:42:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376806445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:15,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:15,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 20:42:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170642597] [2021-11-16 20:42:15,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:15,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 20:42:15,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 20:42:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:42:15,233 INFO L87 Difference]: Start difference. First operand has 183 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 121 states have internal predecessors, (152), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:42:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:15,506 INFO L93 Difference]: Finished difference Result 357 states and 513 transitions. [2021-11-16 20:42:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 20:42:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 64 [2021-11-16 20:42:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:15,517 INFO L225 Difference]: With dead ends: 357 [2021-11-16 20:42:15,517 INFO L226 Difference]: Without dead ends: 178 [2021-11-16 20:42:15,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:42:15,537 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:15,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 304 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:42:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-16 20:42:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-16 20:42:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 116 states have (on average 1.2586206896551724) internal successors, (146), 117 states have internal predecessors, (146), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-16 20:42:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 241 transitions. [2021-11-16 20:42:15,611 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 241 transitions. Word has length 64 [2021-11-16 20:42:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:15,612 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 241 transitions. [2021-11-16 20:42:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:42:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 241 transitions. [2021-11-16 20:42:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-16 20:42:15,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:15,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:15,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:42:15,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1372550286, now seen corresponding path program 1 times [2021-11-16 20:42:15,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:15,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233375752] [2021-11-16 20:42:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:15,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:42:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:42:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:42:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:15,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233375752] [2021-11-16 20:42:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233375752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:15,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:42:15,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119861903] [2021-11-16 20:42:15,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:42:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:42:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:42:15,951 INFO L87 Difference]: Start difference. First operand 178 states and 241 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:42:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:16,742 INFO L93 Difference]: Finished difference Result 317 states and 437 transitions. [2021-11-16 20:42:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:42:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-11-16 20:42:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:16,746 INFO L225 Difference]: With dead ends: 317 [2021-11-16 20:42:16,746 INFO L226 Difference]: Without dead ends: 181 [2021-11-16 20:42:16,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:42:16,748 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 150 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:16,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 625 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:42:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-16 20:42:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-16 20:42:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 120 states have internal predecessors, (148), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2021-11-16 20:42:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 247 transitions. [2021-11-16 20:42:16,763 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 247 transitions. Word has length 64 [2021-11-16 20:42:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 247 transitions. [2021-11-16 20:42:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:42:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 247 transitions. [2021-11-16 20:42:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-16 20:42:16,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:16,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:16,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 20:42:16,766 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash -333611875, now seen corresponding path program 1 times [2021-11-16 20:42:16,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:16,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609719892] [2021-11-16 20:42:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:16,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:16,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:16,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:42:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:17,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:42:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:42:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:17,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:17,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609719892] [2021-11-16 20:42:17,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609719892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:17,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:17,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:42:17,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754470307] [2021-11-16 20:42:17,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:42:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:42:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:42:17,054 INFO L87 Difference]: Start difference. First operand 181 states and 247 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:42:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:17,988 INFO L93 Difference]: Finished difference Result 331 states and 456 transitions. [2021-11-16 20:42:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:42:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2021-11-16 20:42:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:17,991 INFO L225 Difference]: With dead ends: 331 [2021-11-16 20:42:17,991 INFO L226 Difference]: Without dead ends: 201 [2021-11-16 20:42:17,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:42:17,993 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 232 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:17,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 1071 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-16 20:42:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-16 20:42:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2021-11-16 20:42:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 122 states have (on average 1.2459016393442623) internal successors, (152), 123 states have internal predecessors, (152), 48 states have call successors, (48), 14 states have call predecessors, (48), 14 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2021-11-16 20:42:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 251 transitions. [2021-11-16 20:42:18,008 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 251 transitions. Word has length 70 [2021-11-16 20:42:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:18,009 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 251 transitions. [2021-11-16 20:42:18,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:42:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 251 transitions. [2021-11-16 20:42:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-16 20:42:18,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:18,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:18,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 20:42:18,011 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -467625381, now seen corresponding path program 1 times [2021-11-16 20:42:18,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:18,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240026397] [2021-11-16 20:42:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:18,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:42:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:42:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:42:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:18,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240026397] [2021-11-16 20:42:18,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240026397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:18,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:18,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:42:18,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866598047] [2021-11-16 20:42:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:18,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:42:18,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:42:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:42:18,450 INFO L87 Difference]: Start difference. First operand 185 states and 251 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:42:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:19,291 INFO L93 Difference]: Finished difference Result 193 states and 259 transitions. [2021-11-16 20:42:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2021-11-16 20:42:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:19,295 INFO L225 Difference]: With dead ends: 193 [2021-11-16 20:42:19,295 INFO L226 Difference]: Without dead ends: 191 [2021-11-16 20:42:19,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:42:19,298 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 280 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:19,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 922 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-16 20:42:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-16 20:42:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-11-16 20:42:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.24) internal successors, (155), 126 states have internal predecessors, (155), 48 states have call successors, (48), 15 states have call predecessors, (48), 15 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2021-11-16 20:42:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 254 transitions. [2021-11-16 20:42:19,323 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 254 transitions. Word has length 70 [2021-11-16 20:42:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:19,323 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 254 transitions. [2021-11-16 20:42:19,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-16 20:42:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 254 transitions. [2021-11-16 20:42:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 20:42:19,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:19,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:19,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 20:42:19,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 236283433, now seen corresponding path program 1 times [2021-11-16 20:42:19,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:19,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084051050] [2021-11-16 20:42:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:19,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:42:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:42:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:42:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 20:42:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:19,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:19,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084051050] [2021-11-16 20:42:19,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084051050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:19,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:19,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:42:19,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702994440] [2021-11-16 20:42:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:19,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:42:19,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:42:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:42:19,838 INFO L87 Difference]: Start difference. First operand 189 states and 254 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:42:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:21,099 INFO L93 Difference]: Finished difference Result 259 states and 359 transitions. [2021-11-16 20:42:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:42:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 76 [2021-11-16 20:42:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:21,102 INFO L225 Difference]: With dead ends: 259 [2021-11-16 20:42:21,102 INFO L226 Difference]: Without dead ends: 257 [2021-11-16 20:42:21,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:42:21,103 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 124 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:21,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 967 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:42:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-16 20:42:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 215. [2021-11-16 20:42:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 144 states have (on average 1.25) internal successors, (180), 146 states have internal predecessors, (180), 54 states have call successors, (54), 16 states have call predecessors, (54), 16 states have return successors, (58), 52 states have call predecessors, (58), 53 states have call successors, (58) [2021-11-16 20:42:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 292 transitions. [2021-11-16 20:42:21,118 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 292 transitions. Word has length 76 [2021-11-16 20:42:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 292 transitions. [2021-11-16 20:42:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:42:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 292 transitions. [2021-11-16 20:42:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-16 20:42:21,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:21,121 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:21,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 20:42:21,121 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash 618370320, now seen corresponding path program 1 times [2021-11-16 20:42:21,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:21,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289527604] [2021-11-16 20:42:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:21,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:42:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:42:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:42:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:42:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:42:21,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:21,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289527604] [2021-11-16 20:42:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289527604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:21,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:21,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:42:21,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549405099] [2021-11-16 20:42:21,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:21,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:42:21,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:42:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:42:21,342 INFO L87 Difference]: Start difference. First operand 215 states and 292 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:42:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:21,832 INFO L93 Difference]: Finished difference Result 352 states and 488 transitions. [2021-11-16 20:42:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:42:21,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-16 20:42:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:21,835 INFO L225 Difference]: With dead ends: 352 [2021-11-16 20:42:21,835 INFO L226 Difference]: Without dead ends: 290 [2021-11-16 20:42:21,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:42:21,836 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 98 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:21,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 625 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:42:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-16 20:42:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 271. [2021-11-16 20:42:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 184 states have (on average 1.25) internal successors, (230), 186 states have internal predecessors, (230), 70 states have call successors, (70), 16 states have call predecessors, (70), 16 states have return successors, (76), 68 states have call predecessors, (76), 69 states have call successors, (76) [2021-11-16 20:42:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 376 transitions. [2021-11-16 20:42:21,854 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 376 transitions. Word has length 77 [2021-11-16 20:42:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:21,854 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 376 transitions. [2021-11-16 20:42:21,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:42:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 376 transitions. [2021-11-16 20:42:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-16 20:42:21,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:21,856 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:21,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 20:42:21,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash 382756981, now seen corresponding path program 1 times [2021-11-16 20:42:21,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:21,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133244508] [2021-11-16 20:42:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:21,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:42:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:42:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:42:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 20:42:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:42:22,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:22,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133244508] [2021-11-16 20:42:22,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133244508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:22,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:22,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:42:22,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440974048] [2021-11-16 20:42:22,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:22,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:42:22,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:22,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:42:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:42:22,442 INFO L87 Difference]: Start difference. First operand 271 states and 376 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:24,150 INFO L93 Difference]: Finished difference Result 534 states and 761 transitions. [2021-11-16 20:42:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:42:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 82 [2021-11-16 20:42:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:24,152 INFO L225 Difference]: With dead ends: 534 [2021-11-16 20:42:24,153 INFO L226 Difference]: Without dead ends: 315 [2021-11-16 20:42:24,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:42:24,154 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 276 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:24,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1002 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-16 20:42:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-16 20:42:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2021-11-16 20:42:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 209 states have internal predecessors, (257), 84 states have call successors, (84), 16 states have call predecessors, (84), 17 states have return successors, (98), 82 states have call predecessors, (98), 83 states have call successors, (98) [2021-11-16 20:42:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 439 transitions. [2021-11-16 20:42:24,176 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 439 transitions. Word has length 82 [2021-11-16 20:42:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:24,177 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 439 transitions. [2021-11-16 20:42:24,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 439 transitions. [2021-11-16 20:42:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 20:42:24,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:24,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:24,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:42:24,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 158004605, now seen corresponding path program 1 times [2021-11-16 20:42:24,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:24,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302412462] [2021-11-16 20:42:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:24,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:42:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:42:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:42:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:42:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:42:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 20:42:24,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:24,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302412462] [2021-11-16 20:42:24,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302412462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:42:24,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47959320] [2021-11-16 20:42:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:24,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:42:24,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:42:24,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:42:24,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:42:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:24,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:42:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:42:25,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:42:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47959320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:25,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:42:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-16 20:42:25,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770260829] [2021-11-16 20:42:25,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:25,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:42:25,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:42:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:42:25,260 INFO L87 Difference]: Start difference. First operand 308 states and 439 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:25,586 INFO L93 Difference]: Finished difference Result 582 states and 863 transitions. [2021-11-16 20:42:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:42:25,588 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2021-11-16 20:42:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:25,590 INFO L225 Difference]: With dead ends: 582 [2021-11-16 20:42:25,590 INFO L226 Difference]: Without dead ends: 326 [2021-11-16 20:42:25,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:42:25,592 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 40 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:25,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 850 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-11-16 20:42:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-16 20:42:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 313. [2021-11-16 20:42:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 211 states have (on average 1.2511848341232228) internal successors, (264), 214 states have internal predecessors, (264), 84 states have call successors, (84), 16 states have call predecessors, (84), 17 states have return successors, (98), 82 states have call predecessors, (98), 83 states have call successors, (98) [2021-11-16 20:42:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 446 transitions. [2021-11-16 20:42:25,613 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 446 transitions. Word has length 86 [2021-11-16 20:42:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:25,614 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 446 transitions. [2021-11-16 20:42:25,614 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 446 transitions. [2021-11-16 20:42:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-16 20:42:25,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:25,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:25,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-16 20:42:25,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:42:25,843 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1696344635, now seen corresponding path program 1 times [2021-11-16 20:42:25,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:25,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126533676] [2021-11-16 20:42:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:25,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:25,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:25,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:25,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:42:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:42:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:42:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:42:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:42:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 20:42:26,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:26,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126533676] [2021-11-16 20:42:26,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126533676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:42:26,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186921283] [2021-11-16 20:42:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:26,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:42:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:42:26,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:42:26,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:42:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:42:26,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 20:42:26,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:42:26,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186921283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:26,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:42:26,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-16 20:42:26,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98623988] [2021-11-16 20:42:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:26,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:42:26,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:42:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:42:26,778 INFO L87 Difference]: Start difference. First operand 313 states and 446 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:42:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:26,941 INFO L93 Difference]: Finished difference Result 579 states and 839 transitions. [2021-11-16 20:42:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:26,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 86 [2021-11-16 20:42:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:26,945 INFO L225 Difference]: With dead ends: 579 [2021-11-16 20:42:26,945 INFO L226 Difference]: Without dead ends: 318 [2021-11-16 20:42:26,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:42:26,948 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 12 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:26,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1797 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:42:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-16 20:42:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-11-16 20:42:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 215 states have (on average 1.2465116279069768) internal successors, (268), 219 states have internal predecessors, (268), 84 states have call successors, (84), 16 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2021-11-16 20:42:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 459 transitions. [2021-11-16 20:42:26,969 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 459 transitions. Word has length 86 [2021-11-16 20:42:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:26,970 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 459 transitions. [2021-11-16 20:42:26,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:42:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 459 transitions. [2021-11-16 20:42:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 20:42:26,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:26,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:27,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:42:27,191 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,SelfDestructingSolverStorable8 [2021-11-16 20:42:27,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1167977888, now seen corresponding path program 1 times [2021-11-16 20:42:27,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:27,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759809305] [2021-11-16 20:42:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:27,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:42:27,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759809305] [2021-11-16 20:42:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759809305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:27,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:27,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:42:27,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068182653] [2021-11-16 20:42:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:42:27,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:42:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:42:27,380 INFO L87 Difference]: Start difference. First operand 318 states and 459 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:27,936 INFO L93 Difference]: Finished difference Result 589 states and 869 transitions. [2021-11-16 20:42:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:42:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2021-11-16 20:42:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:27,938 INFO L225 Difference]: With dead ends: 589 [2021-11-16 20:42:27,938 INFO L226 Difference]: Without dead ends: 323 [2021-11-16 20:42:27,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:42:27,940 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 87 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:27,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 607 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:42:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-16 20:42:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2021-11-16 20:42:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 217 states have (on average 1.2442396313364055) internal successors, (270), 221 states have internal predecessors, (270), 84 states have call successors, (84), 16 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2021-11-16 20:42:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2021-11-16 20:42:27,962 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 88 [2021-11-16 20:42:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:27,962 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2021-11-16 20:42:27,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2021-11-16 20:42:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 20:42:27,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:27,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:27,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-16 20:42:27,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 852658660, now seen corresponding path program 1 times [2021-11-16 20:42:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:27,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169546714] [2021-11-16 20:42:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:27,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:42:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169546714] [2021-11-16 20:42:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169546714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:28,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:28,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:42:28,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408288983] [2021-11-16 20:42:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:28,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:42:28,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:42:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:42:28,158 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:28,566 INFO L93 Difference]: Finished difference Result 605 states and 902 transitions. [2021-11-16 20:42:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:42:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2021-11-16 20:42:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:28,569 INFO L225 Difference]: With dead ends: 605 [2021-11-16 20:42:28,569 INFO L226 Difference]: Without dead ends: 337 [2021-11-16 20:42:28,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:42:28,571 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 102 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:28,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 624 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:42:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-16 20:42:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 320. [2021-11-16 20:42:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 217 states have (on average 1.23963133640553) internal successors, (269), 221 states have internal predecessors, (269), 84 states have call successors, (84), 16 states have call predecessors, (84), 18 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2021-11-16 20:42:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 460 transitions. [2021-11-16 20:42:28,592 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 460 transitions. Word has length 88 [2021-11-16 20:42:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 460 transitions. [2021-11-16 20:42:28,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:42:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 460 transitions. [2021-11-16 20:42:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 20:42:28,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:28,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:42:28,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-16 20:42:28,597 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2113575910, now seen corresponding path program 1 times [2021-11-16 20:42:28,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:28,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752266886] [2021-11-16 20:42:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:28,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:42:29,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:29,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752266886] [2021-11-16 20:42:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752266886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:29,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:29,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:42:29,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742361962] [2021-11-16 20:42:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:42:29,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:42:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:42:29,659 INFO L87 Difference]: Start difference. First operand 320 states and 460 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:32,004 INFO L93 Difference]: Finished difference Result 338 states and 486 transitions. [2021-11-16 20:42:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-11-16 20:42:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:32,006 INFO L225 Difference]: With dead ends: 338 [2021-11-16 20:42:32,006 INFO L226 Difference]: Without dead ends: 336 [2021-11-16 20:42:32,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:42:32,007 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 183 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:32,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1089 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-16 20:42:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-16 20:42:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 324. [2021-11-16 20:42:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 220 states have (on average 1.2363636363636363) internal successors, (272), 224 states have internal predecessors, (272), 84 states have call successors, (84), 17 states have call predecessors, (84), 19 states have return successors, (107), 82 states have call predecessors, (107), 83 states have call successors, (107) [2021-11-16 20:42:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 463 transitions. [2021-11-16 20:42:32,027 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 463 transitions. Word has length 88 [2021-11-16 20:42:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:32,027 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 463 transitions. [2021-11-16 20:42:32,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:42:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 463 transitions. [2021-11-16 20:42:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:42:32,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:32,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:32,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-16 20:42:32,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1375966178, now seen corresponding path program 1 times [2021-11-16 20:42:32,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:32,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091240526] [2021-11-16 20:42:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:32,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:42:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:42:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:42:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:42:32,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:32,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091240526] [2021-11-16 20:42:32,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091240526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:32,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:32,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:42:32,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571441304] [2021-11-16 20:42:32,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:42:32,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:42:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:42:32,386 INFO L87 Difference]: Start difference. First operand 324 states and 463 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:42:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:33,670 INFO L93 Difference]: Finished difference Result 673 states and 984 transitions. [2021-11-16 20:42:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-11-16 20:42:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:33,674 INFO L225 Difference]: With dead ends: 673 [2021-11-16 20:42:33,674 INFO L226 Difference]: Without dead ends: 484 [2021-11-16 20:42:33,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:42:33,676 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 263 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:33,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1386 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-16 20:42:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-16 20:42:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 432. [2021-11-16 20:42:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 300 states have (on average 1.24) internal successors, (372), 304 states have internal predecessors, (372), 110 states have call successors, (110), 18 states have call predecessors, (110), 21 states have return successors, (153), 109 states have call predecessors, (153), 109 states have call successors, (153) [2021-11-16 20:42:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2021-11-16 20:42:33,712 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 89 [2021-11-16 20:42:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2021-11-16 20:42:33,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 20:42:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2021-11-16 20:42:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 20:42:33,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:33,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:33,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-16 20:42:33,715 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash 162373852, now seen corresponding path program 1 times [2021-11-16 20:42:33,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:33,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092895495] [2021-11-16 20:42:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:33,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:42:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:42:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:42:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:42:34,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:34,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092895495] [2021-11-16 20:42:34,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092895495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:34,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:34,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 20:42:34,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941646985] [2021-11-16 20:42:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 20:42:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 20:42:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:42:34,490 INFO L87 Difference]: Start difference. First operand 432 states and 635 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-16 20:42:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:36,685 INFO L93 Difference]: Finished difference Result 487 states and 728 transitions. [2021-11-16 20:42:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:42:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 89 [2021-11-16 20:42:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:36,689 INFO L225 Difference]: With dead ends: 487 [2021-11-16 20:42:36,689 INFO L226 Difference]: Without dead ends: 485 [2021-11-16 20:42:36,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-16 20:42:36,690 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 300 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:36,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 904 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-16 20:42:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-16 20:42:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 444. [2021-11-16 20:42:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 314 states have internal predecessors, (383), 112 states have call successors, (112), 19 states have call predecessors, (112), 22 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2021-11-16 20:42:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 650 transitions. [2021-11-16 20:42:36,723 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 650 transitions. Word has length 89 [2021-11-16 20:42:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:36,723 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 650 transitions. [2021-11-16 20:42:36,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-16 20:42:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 650 transitions. [2021-11-16 20:42:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-16 20:42:36,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:36,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:36,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 20:42:36,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash 45770096, now seen corresponding path program 1 times [2021-11-16 20:42:36,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:36,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382027008] [2021-11-16 20:42:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:36,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:42:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:42:37,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382027008] [2021-11-16 20:42:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382027008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:37,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:37,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:42:37,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429889705] [2021-11-16 20:42:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:42:37,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:42:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:42:37,536 INFO L87 Difference]: Start difference. First operand 444 states and 650 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 20:42:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:38,983 INFO L93 Difference]: Finished difference Result 460 states and 674 transitions. [2021-11-16 20:42:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:42:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 94 [2021-11-16 20:42:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:38,986 INFO L225 Difference]: With dead ends: 460 [2021-11-16 20:42:38,987 INFO L226 Difference]: Without dead ends: 458 [2021-11-16 20:42:38,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:42:38,988 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 217 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:38,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 974 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-16 20:42:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-16 20:42:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2021-11-16 20:42:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 312 states have (on average 1.2371794871794872) internal successors, (386), 317 states have internal predecessors, (386), 112 states have call successors, (112), 20 states have call predecessors, (112), 23 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2021-11-16 20:42:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 653 transitions. [2021-11-16 20:42:39,019 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 653 transitions. Word has length 94 [2021-11-16 20:42:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 653 transitions. [2021-11-16 20:42:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-16 20:42:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 653 transitions. [2021-11-16 20:42:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-16 20:42:39,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:39,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:39,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-16 20:42:39,022 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 315923145, now seen corresponding path program 1 times [2021-11-16 20:42:39,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:39,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920586590] [2021-11-16 20:42:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:39,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:42:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-16 20:42:39,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:39,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920586590] [2021-11-16 20:42:39,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920586590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:39,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:39,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:42:39,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994924368] [2021-11-16 20:42:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:39,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:42:39,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:42:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:42:39,256 INFO L87 Difference]: Start difference. First operand 448 states and 653 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-16 20:42:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:39,923 INFO L93 Difference]: Finished difference Result 527 states and 756 transitions. [2021-11-16 20:42:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:42:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 93 [2021-11-16 20:42:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:39,929 INFO L225 Difference]: With dead ends: 527 [2021-11-16 20:42:39,929 INFO L226 Difference]: Without dead ends: 452 [2021-11-16 20:42:39,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:42:39,930 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 246 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:39,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 494 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:42:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-16 20:42:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 448. [2021-11-16 20:42:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 312 states have (on average 1.2243589743589745) internal successors, (382), 317 states have internal predecessors, (382), 112 states have call successors, (112), 20 states have call predecessors, (112), 23 states have return successors, (155), 110 states have call predecessors, (155), 111 states have call successors, (155) [2021-11-16 20:42:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 649 transitions. [2021-11-16 20:42:39,966 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 649 transitions. Word has length 93 [2021-11-16 20:42:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:39,967 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 649 transitions. [2021-11-16 20:42:39,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-16 20:42:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 649 transitions. [2021-11-16 20:42:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-16 20:42:39,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:39,969 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2021-11-16 20:42:39,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-16 20:42:39,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash 651202792, now seen corresponding path program 1 times [2021-11-16 20:42:39,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:39,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601280437] [2021-11-16 20:42:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:39,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:40,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:40,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:40,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:42:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:42:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:42:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 20:42:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-16 20:42:41,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:41,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601280437] [2021-11-16 20:42:41,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601280437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:41,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:41,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:42:41,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354189050] [2021-11-16 20:42:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:41,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:42:41,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:42:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:42:41,083 INFO L87 Difference]: Start difference. First operand 448 states and 649 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:42:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:43,240 INFO L93 Difference]: Finished difference Result 492 states and 723 transitions. [2021-11-16 20:42:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 95 [2021-11-16 20:42:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:43,244 INFO L225 Difference]: With dead ends: 492 [2021-11-16 20:42:43,244 INFO L226 Difference]: Without dead ends: 490 [2021-11-16 20:42:43,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:42:43,245 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 406 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:43,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 773 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-16 20:42:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-16 20:42:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 454. [2021-11-16 20:42:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 316 states have (on average 1.2215189873417722) internal successors, (386), 321 states have internal predecessors, (386), 113 states have call successors, (113), 21 states have call predecessors, (113), 24 states have return successors, (156), 111 states have call predecessors, (156), 112 states have call successors, (156) [2021-11-16 20:42:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 655 transitions. [2021-11-16 20:42:43,278 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 655 transitions. Word has length 95 [2021-11-16 20:42:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:43,279 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 655 transitions. [2021-11-16 20:42:43,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-16 20:42:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 655 transitions. [2021-11-16 20:42:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-16 20:42:43,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:43,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:43,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 20:42:43,281 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1202646798, now seen corresponding path program 1 times [2021-11-16 20:42:43,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:43,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995945882] [2021-11-16 20:42:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:43,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:42:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:42:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:42:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 20:42:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:42:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-16 20:42:44,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:44,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995945882] [2021-11-16 20:42:44,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995945882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:44,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:44,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:42:44,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555151196] [2021-11-16 20:42:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:44,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:42:44,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:42:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:42:44,406 INFO L87 Difference]: Start difference. First operand 454 states and 655 transitions. Second operand has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-16 20:42:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:46,281 INFO L93 Difference]: Finished difference Result 496 states and 726 transitions. [2021-11-16 20:42:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:42:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2021-11-16 20:42:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:46,285 INFO L225 Difference]: With dead ends: 496 [2021-11-16 20:42:46,285 INFO L226 Difference]: Without dead ends: 494 [2021-11-16 20:42:46,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:42:46,286 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 245 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:46,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 829 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-16 20:42:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-16 20:42:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 460. [2021-11-16 20:42:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 320 states have (on average 1.21875) internal successors, (390), 325 states have internal predecessors, (390), 114 states have call successors, (114), 22 states have call predecessors, (114), 25 states have return successors, (157), 112 states have call predecessors, (157), 113 states have call successors, (157) [2021-11-16 20:42:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 661 transitions. [2021-11-16 20:42:46,320 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 661 transitions. Word has length 101 [2021-11-16 20:42:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:46,321 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 661 transitions. [2021-11-16 20:42:46,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-16 20:42:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 661 transitions. [2021-11-16 20:42:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:42:46,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:46,323 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:46,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 20:42:46,324 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -849673561, now seen corresponding path program 1 times [2021-11-16 20:42:46,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:46,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370449852] [2021-11-16 20:42:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:46,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:42:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 20:42:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 20:42:46,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:46,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370449852] [2021-11-16 20:42:46,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370449852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:46,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:46,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:42:46,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120641164] [2021-11-16 20:42:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:46,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:42:46,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:42:46,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:42:46,736 INFO L87 Difference]: Start difference. First operand 460 states and 661 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-16 20:42:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:48,214 INFO L93 Difference]: Finished difference Result 514 states and 726 transitions. [2021-11-16 20:42:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:42:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 104 [2021-11-16 20:42:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:48,218 INFO L225 Difference]: With dead ends: 514 [2021-11-16 20:42:48,218 INFO L226 Difference]: Without dead ends: 468 [2021-11-16 20:42:48,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:42:48,219 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 214 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:48,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1387 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-16 20:42:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-16 20:42:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 458. [2021-11-16 20:42:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 319 states have (on average 1.2163009404388714) internal successors, (388), 324 states have internal predecessors, (388), 113 states have call successors, (113), 22 states have call predecessors, (113), 25 states have return successors, (156), 111 states have call predecessors, (156), 112 states have call successors, (156) [2021-11-16 20:42:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 657 transitions. [2021-11-16 20:42:48,253 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 657 transitions. Word has length 104 [2021-11-16 20:42:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:48,254 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 657 transitions. [2021-11-16 20:42:48,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-16 20:42:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 657 transitions. [2021-11-16 20:42:48,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:42:48,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:48,256 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:48,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-16 20:42:48,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2065827287, now seen corresponding path program 1 times [2021-11-16 20:42:48,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:48,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981665001] [2021-11-16 20:42:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:48,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 20:42:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:42:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 20:42:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:42:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:42:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:42:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:42:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:42:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 20:42:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-16 20:42:48,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:48,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981665001] [2021-11-16 20:42:48,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981665001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:42:48,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:42:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-16 20:42:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314637005] [2021-11-16 20:42:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:42:48,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-16 20:42:48,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-16 20:42:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:42:48,819 INFO L87 Difference]: Start difference. First operand 458 states and 657 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 14 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:42:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:51,326 INFO L93 Difference]: Finished difference Result 658 states and 938 transitions. [2021-11-16 20:42:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:42:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 14 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 104 [2021-11-16 20:42:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:51,330 INFO L225 Difference]: With dead ends: 658 [2021-11-16 20:42:51,330 INFO L226 Difference]: Without dead ends: 598 [2021-11-16 20:42:51,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:42:51,332 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 568 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:51,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2797 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-16 20:42:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-16 20:42:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 510. [2021-11-16 20:42:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 360 states have (on average 1.211111111111111) internal successors, (436), 366 states have internal predecessors, (436), 122 states have call successors, (122), 24 states have call predecessors, (122), 27 states have return successors, (156), 119 states have call predecessors, (156), 121 states have call successors, (156) [2021-11-16 20:42:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 714 transitions. [2021-11-16 20:42:51,373 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 714 transitions. Word has length 104 [2021-11-16 20:42:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:51,374 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 714 transitions. [2021-11-16 20:42:51,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 14 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:42:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 714 transitions. [2021-11-16 20:42:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-16 20:42:51,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:51,376 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:51,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-16 20:42:51,377 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1144776342, now seen corresponding path program 1 times [2021-11-16 20:42:51,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:51,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928966857] [2021-11-16 20:42:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:51,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 20:42:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 20:42:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:42:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 20:42:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 20:42:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:42:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:42:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:42:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:42:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:42:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:42:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:42:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:42:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-16 20:42:51,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:42:51,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928966857] [2021-11-16 20:42:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928966857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:42:51,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858454378] [2021-11-16 20:42:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:51,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:42:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:42:51,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:42:51,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:42:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:42:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 2673 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-16 20:42:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:42:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-16 20:42:52,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:42:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-16 20:42:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858454378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:42:52,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:42:52,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 23 [2021-11-16 20:42:52,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319237904] [2021-11-16 20:42:52,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:42:52,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-16 20:42:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:42:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-16 20:42:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:42:52,843 INFO L87 Difference]: Start difference. First operand 510 states and 714 transitions. Second operand has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 20:42:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:42:54,614 INFO L93 Difference]: Finished difference Result 767 states and 1029 transitions. [2021-11-16 20:42:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-16 20:42:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) Word has length 117 [2021-11-16 20:42:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:42:54,617 INFO L225 Difference]: With dead ends: 767 [2021-11-16 20:42:54,617 INFO L226 Difference]: Without dead ends: 343 [2021-11-16 20:42:54,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 20:42:54,619 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:42:54,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1891 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-16 20:42:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-16 20:42:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 336. [2021-11-16 20:42:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 247 states have (on average 1.174089068825911) internal successors, (290), 254 states have internal predecessors, (290), 63 states have call successors, (63), 22 states have call predecessors, (63), 25 states have return successors, (87), 59 states have call predecessors, (87), 62 states have call successors, (87) [2021-11-16 20:42:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 440 transitions. [2021-11-16 20:42:54,643 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 440 transitions. Word has length 117 [2021-11-16 20:42:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:42:54,644 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 440 transitions. [2021-11-16 20:42:54,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 9 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-16 20:42:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 440 transitions. [2021-11-16 20:42:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 20:42:54,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:42:54,646 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:42:54,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 20:42:54,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:42:54,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:42:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:42:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1593488297, now seen corresponding path program 1 times [2021-11-16 20:42:54,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:42:54,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736152669] [2021-11-16 20:42:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:42:54,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:42:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15