./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_append_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 aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:45:42,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:45:42,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:45:42,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:45:42,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:45:42,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:45:42,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:45:42,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:45:42,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:45:42,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:45:42,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:45:42,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:45:42,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:45:42,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:45:42,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:45:42,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:45:42,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:45:42,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:45:42,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:45:42,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:45:42,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:45:42,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:45:42,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:45:42,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:45:42,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:45:42,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:45:42,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:45:42,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:45:42,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:45:42,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:45:42,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:45:42,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:45:42,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:45:42,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:45:42,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:45:42,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:45:42,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:45:42,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:45:42,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:45:42,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:45:42,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:45:42,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-17 23:45:42,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:45:42,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:45:42,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:45:42,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:45:42,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:45:42,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:45:42,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:45:42,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:45:42,469 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:45:42,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:45:42,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:45:42,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:45:42,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:45:42,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:45:42,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:45:42,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:45:42,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:45:42,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:45:42,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:45:42,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:45:42,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:45:42,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:45:42,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:45:42,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:45:42,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:45:42,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:45:42,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:45:42,473 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:45:42,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:45:42,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:45:42,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:45:42,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aad159acc9cbece9fe1ce64619aff83e5e3477bbd84af6f399f8d36d8b5384a2 [2021-12-17 23:45:42,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:45:42,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:45:42,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:45:42,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:45:42,729 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:45:42,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-17 23:45:42,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00881d24a/d4e6583f1a4f4f2c9a93e70ca216c3d2/FLAG4c9f06104 [2021-12-17 23:45:43,504 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:45:43,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness.i [2021-12-17 23:45:43,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00881d24a/d4e6583f1a4f4f2c9a93e70ca216c3d2/FLAG4c9f06104 [2021-12-17 23:45:43,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00881d24a/d4e6583f1a4f4f2c9a93e70ca216c3d2 [2021-12-17 23:45:43,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:45:43,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:45:43,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:45:43,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:45:43,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:45:43,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:45:43" (1/1) ... [2021-12-17 23:45:43,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e24bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:43, skipping insertion in model container [2021-12-17 23:45:43,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:45:43" (1/1) ... [2021-12-17 23:45:43,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:45:43,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:45:44,085 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_append_harness.i[4493,4506] [2021-12-17 23:45:44,092 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_append_harness.i[4553,4566] [2021-12-17 23:45:44,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,676 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,680 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:44,961 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:45:44,963 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:45:44,965 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:45:44,966 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:45:44,967 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:45:44,969 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:45:44,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:45:44,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:45:44,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:45:44,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:45:45,108 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:45:45,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:45:45,263 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:45:45,274 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_append_harness.i[4493,4506] [2021-12-17 23:45:45,274 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_append_harness.i[4553,4566] [2021-12-17 23:45:45,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,298 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,298 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,298 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:45:45,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:45:45,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:45:45,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:45:45,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:45:45,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:45:45,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:45:45,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:45:45,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:45:45,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:45:45,402 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:45:45,460 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,461 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:45:45,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:45:45,676 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:45:45,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45 WrapperNode [2021-12-17 23:45:45,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:45:45,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:45:45,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:45:45,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:45:45,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,867 INFO L137 Inliner]: procedures = 691, calls = 2643, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 859 [2021-12-17 23:45:45,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:45:45,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:45:45,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:45:45,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:45:45,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:45:45,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:45:45,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:45:45,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:45:45,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (1/1) ... [2021-12-17 23:45:45,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:45:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:45,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 23:45:46,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 23:45:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-17 23:45:46,035 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-17 23:45:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-17 23:45:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-17 23:45:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:45:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-17 23:45:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-17 23:45:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_append [2021-12-17 23:45:46,037 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_append [2021-12-17 23:45:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:45:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-17 23:45:46,038 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-17 23:45:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 23:45:46,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 23:45:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:45:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:45:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 23:45:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-17 23:45:46,040 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-17 23:45:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:45:46,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:45:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-17 23:45:46,040 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-17 23:45:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 23:45:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 23:45:46,041 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-17 23:45:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-17 23:45:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:45:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 23:45:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 23:45:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-17 23:45:46,043 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-17 23:45:46,043 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-12-17 23:45:46,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-12-17 23:45:46,043 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-17 23:45:46,043 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-17 23:45:46,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:45:46,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:45:46,308 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:45:46,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:45:46,972 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:45:46,981 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:45:46,981 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 23:45:46,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:45:46 BoogieIcfgContainer [2021-12-17 23:45:46,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:45:46,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:45:46,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:45:46,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:45:46,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:45:43" (1/3) ... [2021-12-17 23:45:46,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af7efc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:45:46, skipping insertion in model container [2021-12-17 23:45:46,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:45:45" (2/3) ... [2021-12-17 23:45:46,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af7efc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:45:46, skipping insertion in model container [2021-12-17 23:45:46,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:45:46" (3/3) ... [2021-12-17 23:45:46,991 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_harness.i [2021-12-17 23:45:47,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:45:47,001 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:45:47,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:45:47,063 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:45:47,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 23:45:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 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) [2021-12-17 23:45:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 23:45:47,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:47,094 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-17 23:45:47,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1617698357, now seen corresponding path program 1 times [2021-12-17 23:45:47,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:47,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641248208] [2021-12-17 23:45:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:47,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:45:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 23:45:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:45:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:45:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:45:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:45:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:45:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-17 23:45:47,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641248208] [2021-12-17 23:45:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641248208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:45:47,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:45:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:45:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837638861] [2021-12-17 23:45:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:45:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:45:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:45:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:45:47,805 INFO L87 Difference]: Start difference. First operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 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 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:45:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:48,100 INFO L93 Difference]: Finished difference Result 336 states and 480 transitions. [2021-12-17 23:45:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:45:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2021-12-17 23:45:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:48,111 INFO L225 Difference]: With dead ends: 336 [2021-12-17 23:45:48,111 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 23:45:48,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:45:48,118 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:48,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 229 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:45:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 23:45:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-17 23:45:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 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) [2021-12-17 23:45:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2021-12-17 23:45:48,159 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 97 [2021-12-17 23:45:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:48,160 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2021-12-17 23:45:48,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:45:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2021-12-17 23:45:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 23:45:48,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:48,164 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-17 23:45:48,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:45:48,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash -369216981, now seen corresponding path program 1 times [2021-12-17 23:45:48,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:48,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726165091] [2021-12-17 23:45:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:48,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:45:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 23:45:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:45:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:45:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:45:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:45:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:45:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 23:45:48,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726165091] [2021-12-17 23:45:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726165091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590007226] [2021-12-17 23:45:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:48,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:48,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:45:48,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:45:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:45:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:45:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 23:45:49,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:45:49,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590007226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:45:49,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:45:49,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-17 23:45:49,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556856121] [2021-12-17 23:45:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:45:49,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:45:49,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:45:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:45:49,257 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 23:45:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:49,413 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2021-12-17 23:45:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:45:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 97 [2021-12-17 23:45:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:49,417 INFO L225 Difference]: With dead ends: 316 [2021-12-17 23:45:49,417 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 23:45:49,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:45:49,419 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 239 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:49,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 673 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:45:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 23:45:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-17 23:45:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 107 states have internal predecessors, (125), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 23:45:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2021-12-17 23:45:49,434 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 97 [2021-12-17 23:45:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:49,435 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2021-12-17 23:45:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 23:45:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2021-12-17 23:45:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 23:45:49,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:49,438 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:45:49,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:45:49,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:49,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1220439414, now seen corresponding path program 1 times [2021-12-17 23:45:49,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:49,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317703141] [2021-12-17 23:45:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:49,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:45:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:45:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:45:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:45:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:45:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:45:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 23:45:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 23:45:49,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317703141] [2021-12-17 23:45:49,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317703141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063579329] [2021-12-17 23:45:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:49,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:49,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:45:49,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:45:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:45:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:45:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 23:45:50,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:45:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 23:45:50,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063579329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:45:50,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:45:50,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-17 23:45:50,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711702976] [2021-12-17 23:45:50,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:45:50,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:45:50,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:45:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:45:50,986 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-17 23:45:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:51,516 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2021-12-17 23:45:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:45:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) Word has length 103 [2021-12-17 23:45:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:51,519 INFO L225 Difference]: With dead ends: 302 [2021-12-17 23:45:51,519 INFO L226 Difference]: Without dead ends: 171 [2021-12-17 23:45:51,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:45:51,521 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 268 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:51,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 404 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:45:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-17 23:45:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-17 23:45:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 110 states have internal predecessors, (127), 48 states have call successors, (48), 13 states have call predecessors, (48), 15 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-17 23:45:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2021-12-17 23:45:51,534 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 103 [2021-12-17 23:45:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:51,534 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2021-12-17 23:45:51,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2021-12-17 23:45:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2021-12-17 23:45:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 23:45:51,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:51,536 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:45:51,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:45:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 23:45:51,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2066662021, now seen corresponding path program 1 times [2021-12-17 23:45:51,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276916032] [2021-12-17 23:45:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:51,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:45:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:45:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:45:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:45:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:45:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:45:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:45:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 23:45:52,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:52,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276916032] [2021-12-17 23:45:52,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276916032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:45:52,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:45:52,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 23:45:52,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896663897] [2021-12-17 23:45:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:45:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:45:52,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:45:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:45:52,065 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 23:45:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:52,528 INFO L93 Difference]: Finished difference Result 300 states and 401 transitions. [2021-12-17 23:45:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:45:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 105 [2021-12-17 23:45:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:52,530 INFO L225 Difference]: With dead ends: 300 [2021-12-17 23:45:52,530 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 23:45:52,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:45:52,532 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 160 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:52,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 527 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 23:45:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 23:45:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-17 23:45:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 23:45:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2021-12-17 23:45:52,545 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 105 [2021-12-17 23:45:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:52,546 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2021-12-17 23:45:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 23:45:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2021-12-17 23:45:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 23:45:52,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:52,547 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:45:52,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:45:52,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813690, now seen corresponding path program 1 times [2021-12-17 23:45:52,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:52,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623351246] [2021-12-17 23:45:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:52,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:45:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:45:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:45:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:45:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:45:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:45:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:45:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 23:45:52,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623351246] [2021-12-17 23:45:52,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623351246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:52,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465031804] [2021-12-17 23:45:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:52,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:52,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:45:52,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:45:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:45:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:45:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 23:45:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:45:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 23:45:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465031804] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:53,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:45:53,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 21 [2021-12-17 23:45:53,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978682098] [2021-12-17 23:45:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:45:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:45:53,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:45:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:45:53,897 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-17 23:45:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:54,165 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2021-12-17 23:45:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:45:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 111 [2021-12-17 23:45:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:54,168 INFO L225 Difference]: With dead ends: 291 [2021-12-17 23:45:54,168 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 23:45:54,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-17 23:45:54,170 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 230 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:54,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 954 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:45:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 23:45:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-17 23:45:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.174757281553398) internal successors, (121), 104 states have internal predecessors, (121), 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) [2021-12-17 23:45:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2021-12-17 23:45:54,187 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 111 [2021-12-17 23:45:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:54,187 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2021-12-17 23:45:54,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-17 23:45:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2021-12-17 23:45:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 23:45:54,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:54,188 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:45:54,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:45:54,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:54,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1770709749, now seen corresponding path program 1 times [2021-12-17 23:45:54,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:54,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502140048] [2021-12-17 23:45:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:54,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:45:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:45:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:45:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:45:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:45:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:45:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 23:45:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 23:45:54,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502140048] [2021-12-17 23:45:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502140048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:54,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067031347] [2021-12-17 23:45:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:54,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:54,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:45:54,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:45:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 23:45:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:45:55,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:45:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-17 23:45:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 23:45:56,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:45:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 23:45:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067031347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:45:56,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:45:56,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 19 [2021-12-17 23:45:56,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289418037] [2021-12-17 23:45:56,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:45:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:45:56,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:45:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:45:56,468 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 16 states have internal predecessors, (90), 8 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-12-17 23:45:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:45:58,039 INFO L93 Difference]: Finished difference Result 385 states and 520 transitions. [2021-12-17 23:45:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 23:45:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 16 states have internal predecessors, (90), 8 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 113 [2021-12-17 23:45:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:45:58,042 INFO L225 Difference]: With dead ends: 385 [2021-12-17 23:45:58,042 INFO L226 Difference]: Without dead ends: 269 [2021-12-17 23:45:58,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 237 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 23:45:58,044 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 238 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:45:58,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1084 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1510 Invalid, 0 Unknown, 416 Unchecked, 1.2s Time] [2021-12-17 23:45:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-17 23:45:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 225. [2021-12-17 23:45:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.1748251748251748) internal successors, (168), 144 states have internal predecessors, (168), 63 states have call successors, (63), 17 states have call predecessors, (63), 18 states have return successors, (71), 63 states have call predecessors, (71), 62 states have call successors, (71) [2021-12-17 23:45:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 302 transitions. [2021-12-17 23:45:58,060 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 302 transitions. Word has length 113 [2021-12-17 23:45:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:45:58,060 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 302 transitions. [2021-12-17 23:45:58,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 16 states have internal predecessors, (90), 8 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-12-17 23:45:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 302 transitions. [2021-12-17 23:45:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 23:45:58,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:45:58,062 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:45:58,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:45:58,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:58,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:45:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:45:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1925736603, now seen corresponding path program 1 times [2021-12-17 23:45:58,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:45:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750690636] [2021-12-17 23:45:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:45:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:45:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:45:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:45:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:45:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:45:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:45:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:45:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:45:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:45:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 23:45:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:45:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 23:45:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 23:45:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 23:45:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-17 23:45:58,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:45:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750690636] [2021-12-17 23:45:58,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750690636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:45:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757664551] [2021-12-17 23:45:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:45:58,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:45:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:45:58,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:45:58,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:45:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:45:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 23:45:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:45:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 23:45:59,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:45:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-17 23:45:59,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757664551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:45:59,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:45:59,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 20 [2021-12-17 23:45:59,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702854098] [2021-12-17 23:45:59,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:45:59,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:45:59,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:45:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:45:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:45:59,724 INFO L87 Difference]: Start difference. First operand 225 states and 302 transitions. Second operand has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-17 23:46:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:00,912 INFO L93 Difference]: Finished difference Result 391 states and 532 transitions. [2021-12-17 23:46:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:46:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 121 [2021-12-17 23:46:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:00,915 INFO L225 Difference]: With dead ends: 391 [2021-12-17 23:46:00,915 INFO L226 Difference]: Without dead ends: 243 [2021-12-17 23:46:00,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-17 23:46:00,917 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 121 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:00,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1763 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 23:46:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-17 23:46:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 234. [2021-12-17 23:46:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 153 states have internal predecessors, (175), 63 states have call successors, (63), 17 states have call predecessors, (63), 20 states have return successors, (83), 63 states have call predecessors, (83), 62 states have call successors, (83) [2021-12-17 23:46:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2021-12-17 23:46:00,939 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 121 [2021-12-17 23:46:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:00,940 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2021-12-17 23:46:00,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-12-17 23:46:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2021-12-17 23:46:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 23:46:00,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:00,942 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:00,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:01,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:01,156 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash -508813440, now seen corresponding path program 1 times [2021-12-17 23:46:01,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:01,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925144541] [2021-12-17 23:46:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:01,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:46:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:46:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:46:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:46:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:46:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-17 23:46:01,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925144541] [2021-12-17 23:46:01,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925144541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:01,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:46:01,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 23:46:01,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639864072] [2021-12-17 23:46:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:01,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 23:46:01,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 23:46:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:46:01,436 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:02,080 INFO L93 Difference]: Finished difference Result 389 states and 531 transitions. [2021-12-17 23:46:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 23:46:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2021-12-17 23:46:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:02,084 INFO L225 Difference]: With dead ends: 389 [2021-12-17 23:46:02,084 INFO L226 Difference]: Without dead ends: 234 [2021-12-17 23:46:02,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:46:02,085 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 101 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:02,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 892 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:46:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-17 23:46:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-17 23:46:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 150 states have (on average 1.16) internal successors, (174), 153 states have internal predecessors, (174), 63 states have call successors, (63), 17 states have call predecessors, (63), 20 states have return successors, (81), 63 states have call predecessors, (81), 62 states have call successors, (81) [2021-12-17 23:46:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 318 transitions. [2021-12-17 23:46:02,099 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 318 transitions. Word has length 123 [2021-12-17 23:46:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:02,100 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 318 transitions. [2021-12-17 23:46:02,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 318 transitions. [2021-12-17 23:46:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 23:46:02,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:02,102 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:46:02,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 309093908, now seen corresponding path program 1 times [2021-12-17 23:46:02,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:02,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2985332] [2021-12-17 23:46:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:02,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:46:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:46:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:46:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:46:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 23:46:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 23:46:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-17 23:46:02,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2985332] [2021-12-17 23:46:02,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2985332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:02,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:46:02,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:46:02,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095934593] [2021-12-17 23:46:02,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:02,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:46:02,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:46:02,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:46:02,370 INFO L87 Difference]: Start difference. First operand 234 states and 318 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:46:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:02,902 INFO L93 Difference]: Finished difference Result 244 states and 329 transitions. [2021-12-17 23:46:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:46:02,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 131 [2021-12-17 23:46:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:02,904 INFO L225 Difference]: With dead ends: 244 [2021-12-17 23:46:02,904 INFO L226 Difference]: Without dead ends: 242 [2021-12-17 23:46:02,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:46:02,905 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 116 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:02,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 812 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:46:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-17 23:46:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-17 23:46:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 153 states have (on average 1.1568627450980393) internal successors, (177), 156 states have internal predecessors, (177), 65 states have call successors, (65), 18 states have call predecessors, (65), 21 states have return successors, (83), 65 states have call predecessors, (83), 64 states have call successors, (83) [2021-12-17 23:46:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 325 transitions. [2021-12-17 23:46:02,925 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 325 transitions. Word has length 131 [2021-12-17 23:46:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:02,926 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 325 transitions. [2021-12-17 23:46:02,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:46:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 325 transitions. [2021-12-17 23:46:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 23:46:02,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:02,928 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:02,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 23:46:02,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 14294821, now seen corresponding path program 1 times [2021-12-17 23:46:02,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:02,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682395887] [2021-12-17 23:46:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:02,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:46:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:46:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:46:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:46:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-17 23:46:03,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:03,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682395887] [2021-12-17 23:46:03,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682395887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:03,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754526511] [2021-12-17 23:46:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:03,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:03,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:03,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:03,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:46:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:03,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:46:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 23:46:03,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:03,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754526511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:03,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:03,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-12-17 23:46:03,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212434624] [2021-12-17 23:46:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:46:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:46:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:46:03,890 INFO L87 Difference]: Start difference. First operand 240 states and 325 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:04,053 INFO L93 Difference]: Finished difference Result 416 states and 571 transitions. [2021-12-17 23:46:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:46:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 125 [2021-12-17 23:46:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:04,055 INFO L225 Difference]: With dead ends: 416 [2021-12-17 23:46:04,055 INFO L226 Difference]: Without dead ends: 242 [2021-12-17 23:46:04,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:46:04,057 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 15 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:04,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 755 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-12-17 23:46:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-17 23:46:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-12-17 23:46:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 153 states have (on average 1.1437908496732025) internal successors, (175), 156 states have internal predecessors, (175), 65 states have call successors, (65), 18 states have call predecessors, (65), 21 states have return successors, (83), 65 states have call predecessors, (83), 64 states have call successors, (83) [2021-12-17 23:46:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 323 transitions. [2021-12-17 23:46:04,072 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 323 transitions. Word has length 125 [2021-12-17 23:46:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:04,073 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 323 transitions. [2021-12-17 23:46:04,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 323 transitions. [2021-12-17 23:46:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 23:46:04,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:04,075 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:04,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:04,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:04,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1113949143, now seen corresponding path program 1 times [2021-12-17 23:46:04,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42227257] [2021-12-17 23:46:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:04,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:46:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:46:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:46:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:46:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-17 23:46:04,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:04,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42227257] [2021-12-17 23:46:04,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42227257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:04,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709313648] [2021-12-17 23:46:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:04,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:04,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:04,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:46:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 23:46:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:46:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 23:46:05,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:05,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709313648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:05,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:05,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-17 23:46:05,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225002321] [2021-12-17 23:46:05,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:05,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:46:05,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:46:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:46:05,698 INFO L87 Difference]: Start difference. First operand 240 states and 323 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-17 23:46:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:05,743 INFO L93 Difference]: Finished difference Result 480 states and 643 transitions. [2021-12-17 23:46:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:46:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 125 [2021-12-17 23:46:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:05,746 INFO L225 Difference]: With dead ends: 480 [2021-12-17 23:46:05,746 INFO L226 Difference]: Without dead ends: 253 [2021-12-17 23:46:05,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:46:05,747 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 28 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:05,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1011 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2021-12-17 23:46:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-17 23:46:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-12-17 23:46:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 168 states have internal predecessors, (190), 65 states have call successors, (65), 19 states have call predecessors, (65), 22 states have return successors, (83), 65 states have call predecessors, (83), 64 states have call successors, (83) [2021-12-17 23:46:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 338 transitions. [2021-12-17 23:46:05,776 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 338 transitions. Word has length 125 [2021-12-17 23:46:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:05,776 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 338 transitions. [2021-12-17 23:46:05,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-17 23:46:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 338 transitions. [2021-12-17 23:46:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 23:46:05,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:05,778 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:05,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:06,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1997458133, now seen corresponding path program 1 times [2021-12-17 23:46:06,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218431243] [2021-12-17 23:46:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:06,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:46:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:46:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:46:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:46:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 23:46:06,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218431243] [2021-12-17 23:46:06,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218431243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:06,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493564728] [2021-12-17 23:46:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:06,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:06,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:06,200 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:46:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:46:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:46:06,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:06,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493564728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:06,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:06,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:46:06,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284008868] [2021-12-17 23:46:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:06,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:46:06,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:46:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:46:06,773 INFO L87 Difference]: Start difference. First operand 253 states and 338 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:06,800 INFO L93 Difference]: Finished difference Result 488 states and 664 transitions. [2021-12-17 23:46:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:46:06,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 125 [2021-12-17 23:46:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:06,803 INFO L225 Difference]: With dead ends: 488 [2021-12-17 23:46:06,803 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 23:46:06,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:46:06,804 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 20 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 637 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:46:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 23:46:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2021-12-17 23:46:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 160 states have (on average 1.15) internal successors, (184), 162 states have internal predecessors, (184), 65 states have call successors, (65), 19 states have call predecessors, (65), 21 states have return successors, (82), 65 states have call predecessors, (82), 64 states have call successors, (82) [2021-12-17 23:46:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 331 transitions. [2021-12-17 23:46:06,821 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 331 transitions. Word has length 125 [2021-12-17 23:46:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:06,821 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 331 transitions. [2021-12-17 23:46:06,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 331 transitions. [2021-12-17 23:46:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 23:46:06,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:06,824 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:06,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:07,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 23:46:07,043 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash 265733617, now seen corresponding path program 1 times [2021-12-17 23:46:07,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:07,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73380496] [2021-12-17 23:46:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:07,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 23:46:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:46:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 23:46:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:46:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 23:46:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:46:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 23:46:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:46:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:46:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 23:46:07,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73380496] [2021-12-17 23:46:07,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73380496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:07,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893532407] [2021-12-17 23:46:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:07,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:07,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:07,348 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:07,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:46:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:46:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:46:07,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893532407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:07,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-17 23:46:07,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399239944] [2021-12-17 23:46:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:07,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:46:07,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:46:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:46:07,989 INFO L87 Difference]: Start difference. First operand 247 states and 331 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:08,126 INFO L93 Difference]: Finished difference Result 502 states and 691 transitions. [2021-12-17 23:46:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:46:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2021-12-17 23:46:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:08,128 INFO L225 Difference]: With dead ends: 502 [2021-12-17 23:46:08,128 INFO L226 Difference]: Without dead ends: 277 [2021-12-17 23:46:08,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:46:08,130 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 42 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:08,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 748 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-12-17 23:46:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-17 23:46:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 260. [2021-12-17 23:46:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 173 states have (on average 1.1676300578034682) internal successors, (202), 175 states have internal predecessors, (202), 65 states have call successors, (65), 19 states have call predecessors, (65), 21 states have return successors, (82), 65 states have call predecessors, (82), 64 states have call successors, (82) [2021-12-17 23:46:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 349 transitions. [2021-12-17 23:46:08,143 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 349 transitions. Word has length 129 [2021-12-17 23:46:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:08,144 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 349 transitions. [2021-12-17 23:46:08,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 349 transitions. [2021-12-17 23:46:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 23:46:08,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:08,145 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:08,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:08,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 23:46:08,363 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1353241297, now seen corresponding path program 1 times [2021-12-17 23:46:08,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122457858] [2021-12-17 23:46:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:08,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 23:46:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:46:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 23:46:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:46:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 23:46:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:46:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 23:46:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:46:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:46:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 23:46:08,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122457858] [2021-12-17 23:46:08,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122457858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534527119] [2021-12-17 23:46:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:08,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:08,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:08,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 23:46:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 23:46:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:46:09,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534527119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:09,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:09,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-17 23:46:09,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831147094] [2021-12-17 23:46:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:46:09,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:46:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:46:09,326 INFO L87 Difference]: Start difference. First operand 260 states and 349 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 23:46:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:09,442 INFO L93 Difference]: Finished difference Result 501 states and 677 transitions. [2021-12-17 23:46:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:46:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 129 [2021-12-17 23:46:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:09,445 INFO L225 Difference]: With dead ends: 501 [2021-12-17 23:46:09,445 INFO L226 Difference]: Without dead ends: 265 [2021-12-17 23:46:09,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:46:09,446 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 12 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:09,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1588 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:46:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-17 23:46:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-12-17 23:46:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 177 states have (on average 1.1638418079096045) internal successors, (206), 180 states have internal predecessors, (206), 65 states have call successors, (65), 19 states have call predecessors, (65), 22 states have return successors, (88), 65 states have call predecessors, (88), 64 states have call successors, (88) [2021-12-17 23:46:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2021-12-17 23:46:09,459 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 129 [2021-12-17 23:46:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:09,459 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2021-12-17 23:46:09,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 23:46:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2021-12-17 23:46:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 23:46:09,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:09,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:09,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:09,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 23:46:09,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash 498704820, now seen corresponding path program 1 times [2021-12-17 23:46:09,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040178778] [2021-12-17 23:46:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:09,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:46:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 23:46:09,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:09,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040178778] [2021-12-17 23:46:09,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040178778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:09,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750281699] [2021-12-17 23:46:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:09,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:09,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:09,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 23:46:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:46:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:46:10,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:10,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750281699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:10,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:10,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:46:10,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409003795] [2021-12-17 23:46:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:10,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:46:10,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:46:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:46:10,435 INFO L87 Difference]: Start difference. First operand 265 states and 359 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:10,459 INFO L93 Difference]: Finished difference Result 511 states and 702 transitions. [2021-12-17 23:46:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:46:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-17 23:46:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:10,461 INFO L225 Difference]: With dead ends: 511 [2021-12-17 23:46:10,461 INFO L226 Difference]: Without dead ends: 268 [2021-12-17 23:46:10,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:46:10,463 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 9 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:10,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 630 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:46:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-17 23:46:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2021-12-17 23:46:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 177 states have (on average 1.152542372881356) internal successors, (204), 180 states have internal predecessors, (204), 65 states have call successors, (65), 19 states have call predecessors, (65), 22 states have return successors, (88), 65 states have call predecessors, (88), 64 states have call successors, (88) [2021-12-17 23:46:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-12-17 23:46:10,475 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 131 [2021-12-17 23:46:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:10,475 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-12-17 23:46:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-12-17 23:46:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 23:46:10,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:10,476 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:10,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:10,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 23:46:10,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 248293624, now seen corresponding path program 1 times [2021-12-17 23:46:10,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297042573] [2021-12-17 23:46:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:10,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:46:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 23:46:10,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297042573] [2021-12-17 23:46:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297042573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174123032] [2021-12-17 23:46:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:10,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:10,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:10,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 23:46:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:46:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 23:46:11,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:46:11,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174123032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:11,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:46:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:46:11,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166812062] [2021-12-17 23:46:11,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:11,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:46:11,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:46:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:46:11,423 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:11,448 INFO L93 Difference]: Finished difference Result 515 states and 713 transitions. [2021-12-17 23:46:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:46:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 131 [2021-12-17 23:46:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:11,450 INFO L225 Difference]: With dead ends: 515 [2021-12-17 23:46:11,451 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 23:46:11,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:46:11,452 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 34 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:11,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 628 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:46:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 23:46:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 257. [2021-12-17 23:46:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 169 states have (on average 1.1301775147928994) internal successors, (191), 172 states have internal predecessors, (191), 65 states have call successors, (65), 19 states have call predecessors, (65), 22 states have return successors, (88), 65 states have call predecessors, (88), 64 states have call successors, (88) [2021-12-17 23:46:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 344 transitions. [2021-12-17 23:46:11,465 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 344 transitions. Word has length 131 [2021-12-17 23:46:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:11,465 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 344 transitions. [2021-12-17 23:46:11,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 23:46:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 344 transitions. [2021-12-17 23:46:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 23:46:11,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:11,467 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:11,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:11,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 23:46:11,683 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1279334522, now seen corresponding path program 1 times [2021-12-17 23:46:11,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129610524] [2021-12-17 23:46:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:11,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:46:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-17 23:46:12,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:12,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129610524] [2021-12-17 23:46:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129610524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:12,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:46:12,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-17 23:46:12,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280477538] [2021-12-17 23:46:12,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:12,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 23:46:12,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 23:46:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:46:12,404 INFO L87 Difference]: Start difference. First operand 257 states and 344 transitions. Second operand has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-17 23:46:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:14,259 INFO L93 Difference]: Finished difference Result 465 states and 634 transitions. [2021-12-17 23:46:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 23:46:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) Word has length 131 [2021-12-17 23:46:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:14,262 INFO L225 Difference]: With dead ends: 465 [2021-12-17 23:46:14,262 INFO L226 Difference]: Without dead ends: 268 [2021-12-17 23:46:14,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-12-17 23:46:14,264 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 372 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:14,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 638 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 23:46:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-17 23:46:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 250. [2021-12-17 23:46:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 159 states have (on average 1.1257861635220126) internal successors, (179), 162 states have internal predecessors, (179), 69 states have call successors, (69), 18 states have call predecessors, (69), 21 states have return successors, (93), 69 states have call predecessors, (93), 68 states have call successors, (93) [2021-12-17 23:46:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 341 transitions. [2021-12-17 23:46:14,279 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 341 transitions. Word has length 131 [2021-12-17 23:46:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:14,279 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 341 transitions. [2021-12-17 23:46:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-17 23:46:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 341 transitions. [2021-12-17 23:46:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 23:46:14,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:14,281 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:14,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 23:46:14,281 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1868885376, now seen corresponding path program 1 times [2021-12-17 23:46:14,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:14,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270060919] [2021-12-17 23:46:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:14,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:46:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 23:46:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 23:46:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 23:46:14,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:14,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270060919] [2021-12-17 23:46:14,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270060919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771927148] [2021-12-17 23:46:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:14,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:14,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:14,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 23:46:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 23:46:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 23:46:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:46:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-17 23:46:15,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771927148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:46:15,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:46:15,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 11] total 22 [2021-12-17 23:46:15,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97364317] [2021-12-17 23:46:15,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:46:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 23:46:15,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 23:46:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:46:15,725 INFO L87 Difference]: Start difference. First operand 250 states and 341 transitions. Second operand has 22 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 17 states have internal predecessors, (100), 5 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-17 23:46:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:17,074 INFO L93 Difference]: Finished difference Result 451 states and 624 transitions. [2021-12-17 23:46:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 23:46:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 17 states have internal predecessors, (100), 5 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 135 [2021-12-17 23:46:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:17,077 INFO L225 Difference]: With dead ends: 451 [2021-12-17 23:46:17,077 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 23:46:17,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 23:46:17,079 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 121 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:17,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1932 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 23:46:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 23:46:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2021-12-17 23:46:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 154 states have (on average 1.1168831168831168) internal successors, (172), 158 states have internal predecessors, (172), 69 states have call successors, (69), 17 states have call predecessors, (69), 21 states have return successors, (91), 69 states have call predecessors, (91), 68 states have call successors, (91) [2021-12-17 23:46:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 332 transitions. [2021-12-17 23:46:17,092 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 332 transitions. Word has length 135 [2021-12-17 23:46:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:17,092 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 332 transitions. [2021-12-17 23:46:17,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 17 states have internal predecessors, (100), 5 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-17 23:46:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 332 transitions. [2021-12-17 23:46:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 23:46:17,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:17,096 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:17,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:17,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 23:46:17,317 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1181880245, now seen corresponding path program 1 times [2021-12-17 23:46:17,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197033088] [2021-12-17 23:46:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:17,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:46:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:46:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 23:46:18,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:18,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197033088] [2021-12-17 23:46:18,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197033088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:18,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:46:18,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-17 23:46:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963487302] [2021-12-17 23:46:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 23:46:18,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 23:46:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:46:18,221 INFO L87 Difference]: Start difference. First operand 245 states and 332 transitions. Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 23:46:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:19,247 INFO L93 Difference]: Finished difference Result 282 states and 379 transitions. [2021-12-17 23:46:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 23:46:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 137 [2021-12-17 23:46:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:19,249 INFO L225 Difference]: With dead ends: 282 [2021-12-17 23:46:19,249 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 23:46:19,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-12-17 23:46:19,250 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 195 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:19,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 1061 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 23:46:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 23:46:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 272. [2021-12-17 23:46:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 179 states have internal predecessors, (195), 73 states have call successors, (73), 19 states have call predecessors, (73), 24 states have return successors, (98), 73 states have call predecessors, (98), 72 states have call successors, (98) [2021-12-17 23:46:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 366 transitions. [2021-12-17 23:46:19,265 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 366 transitions. Word has length 137 [2021-12-17 23:46:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:19,265 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 366 transitions. [2021-12-17 23:46:19,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 23:46:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 366 transitions. [2021-12-17 23:46:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 23:46:19,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:19,267 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 23:46:19,268 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1630010942, now seen corresponding path program 1 times [2021-12-17 23:46:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329567118] [2021-12-17 23:46:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:19,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:46:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:46:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:46:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:46:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:46:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 23:46:19,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329567118] [2021-12-17 23:46:19,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329567118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639077400] [2021-12-17 23:46:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:19,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:19,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:19,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 23:46:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 23:46:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:20,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-17 23:46:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 23:46:20,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:46:21,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-17 23:46:21,078 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-17 23:46:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-12-17 23:46:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 23:46:21,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639077400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:46:21,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:46:21,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 19 [2021-12-17 23:46:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061123067] [2021-12-17 23:46:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:46:21,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:46:21,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:46:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:46:21,162 INFO L87 Difference]: Start difference. First operand 272 states and 366 transitions. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 23:46:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:22,710 INFO L93 Difference]: Finished difference Result 458 states and 587 transitions. [2021-12-17 23:46:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 23:46:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 147 [2021-12-17 23:46:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:22,712 INFO L225 Difference]: With dead ends: 458 [2021-12-17 23:46:22,712 INFO L226 Difference]: Without dead ends: 302 [2021-12-17 23:46:22,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 301 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 23:46:22,713 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 173 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:22,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1192 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1869 Invalid, 0 Unknown, 464 Unchecked, 1.1s Time] [2021-12-17 23:46:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-17 23:46:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 274. [2021-12-17 23:46:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.1189189189189188) internal successors, (207), 189 states have internal predecessors, (207), 63 states have call successors, (63), 22 states have call predecessors, (63), 25 states have return successors, (78), 62 states have call predecessors, (78), 62 states have call successors, (78) [2021-12-17 23:46:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 348 transitions. [2021-12-17 23:46:22,727 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 348 transitions. Word has length 147 [2021-12-17 23:46:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:22,728 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 348 transitions. [2021-12-17 23:46:22,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 16 states have internal predecessors, (130), 7 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 23:46:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 348 transitions. [2021-12-17 23:46:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:46:22,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:22,730 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:22,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:22,956 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash 649000271, now seen corresponding path program 1 times [2021-12-17 23:46:22,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425123192] [2021-12-17 23:46:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:22,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:46:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-17 23:46:24,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425123192] [2021-12-17 23:46:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425123192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612198693] [2021-12-17 23:46:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:24,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:24,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:24,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 23:46:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 23:46:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:46:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:46:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-17 23:46:46,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:46:46,193 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 23:46:46,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-12-17 23:46:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 61 proven. 28 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 23:46:46,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:46:47,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612198693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:47,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:46:47,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-12-17 23:46:47,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668156442] [2021-12-17 23:46:47,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:46:47,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 23:46:47,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 23:46:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1341, Unknown=2, NotChecked=0, Total=1482 [2021-12-17 23:46:47,503 INFO L87 Difference]: Start difference. First operand 274 states and 348 transitions. Second operand has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 29 states have internal predecessors, (154), 15 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-17 23:46:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:49,521 INFO L93 Difference]: Finished difference Result 487 states and 602 transitions. [2021-12-17 23:46:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:46:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 29 states have internal predecessors, (154), 15 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) Word has length 141 [2021-12-17 23:46:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:49,524 INFO L225 Difference]: With dead ends: 487 [2021-12-17 23:46:49,524 INFO L226 Difference]: Without dead ends: 336 [2021-12-17 23:46:49,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=384, Invalid=3274, Unknown=2, NotChecked=0, Total=3660 [2021-12-17 23:46:49,526 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 365 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:49,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1323 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2128 Invalid, 0 Unknown, 460 Unchecked, 1.3s Time] [2021-12-17 23:46:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-17 23:46:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 315. [2021-12-17 23:46:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 221 states have (on average 1.1131221719457014) internal successors, (246), 226 states have internal predecessors, (246), 63 states have call successors, (63), 26 states have call predecessors, (63), 30 states have return successors, (78), 62 states have call predecessors, (78), 62 states have call successors, (78) [2021-12-17 23:46:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2021-12-17 23:46:49,543 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 141 [2021-12-17 23:46:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:49,543 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2021-12-17 23:46:49,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 29 states have internal predecessors, (154), 15 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-17 23:46:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2021-12-17 23:46:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:46:49,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:49,545 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:49,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:49,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:49,772 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590549, now seen corresponding path program 1 times [2021-12-17 23:46:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:49,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217207185] [2021-12-17 23:46:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:49,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:46:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 23:46:50,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217207185] [2021-12-17 23:46:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217207185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059904334] [2021-12-17 23:46:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:50,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:50,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:50,159 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:50,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 23:46:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 23:46:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:46:50,817 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:46:50,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-17 23:46:51,216 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:46:51,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-17 23:46:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-12-17 23:46:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 43 proven. 66 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 23:46:52,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:46:53,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1386 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1386) |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base|))) (let ((.cse0 (mod (select .cse1 (+ |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.offset| 16)) 18446744073709551616))) (or (= 0 .cse0) (<= (mod (select .cse1 |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.offset|) 18446744073709551616) .cse0))))) is different from false [2021-12-17 23:46:53,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059904334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:53,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:46:53,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24] total 32 [2021-12-17 23:46:53,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375075292] [2021-12-17 23:46:53,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:46:53,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 23:46:53,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 23:46:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1482, Unknown=1, NotChecked=78, Total=1722 [2021-12-17 23:46:53,468 INFO L87 Difference]: Start difference. First operand 315 states and 387 transitions. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 29 states have internal predecessors, (151), 11 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-17 23:46:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:56,785 INFO L93 Difference]: Finished difference Result 833 states and 1100 transitions. [2021-12-17 23:46:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 23:46:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 29 states have internal predecessors, (151), 11 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 141 [2021-12-17 23:46:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:56,789 INFO L225 Difference]: With dead ends: 833 [2021-12-17 23:46:56,789 INFO L226 Difference]: Without dead ends: 587 [2021-12-17 23:46:56,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 207 SyntacticMatches, 24 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=688, Invalid=4717, Unknown=1, NotChecked=144, Total=5550 [2021-12-17 23:46:56,792 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 419 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 5211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2055 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:56,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1855 Invalid, 5211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 2822 Invalid, 0 Unknown, 2055 Unchecked, 1.9s Time] [2021-12-17 23:46:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-12-17 23:46:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 485. [2021-12-17 23:46:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 339 states have (on average 1.0943952802359882) internal successors, (371), 351 states have internal predecessors, (371), 98 states have call successors, (98), 37 states have call predecessors, (98), 47 states have return successors, (136), 96 states have call predecessors, (136), 97 states have call successors, (136) [2021-12-17 23:46:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 605 transitions. [2021-12-17 23:46:56,823 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 605 transitions. Word has length 141 [2021-12-17 23:46:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:56,824 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 605 transitions. [2021-12-17 23:46:56,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 29 states have internal predecessors, (151), 11 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-17 23:46:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 605 transitions. [2021-12-17 23:46:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:46:56,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:56,826 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:56,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 23:46:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 23:46:57,039 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2075755987, now seen corresponding path program 1 times [2021-12-17 23:46:57,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:57,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967385083] [2021-12-17 23:46:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:57,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:46:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:46:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:46:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:46:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:46:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:46:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:46:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:46:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:46:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:46:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:46:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:46:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 23:46:57,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967385083] [2021-12-17 23:46:57,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967385083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:46:57,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:46:57,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:46:57,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838600435] [2021-12-17 23:46:57,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:46:57,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:46:57,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:46:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:46:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:46:57,293 INFO L87 Difference]: Start difference. First operand 485 states and 605 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:46:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:46:57,757 INFO L93 Difference]: Finished difference Result 657 states and 831 transitions. [2021-12-17 23:46:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:46:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 141 [2021-12-17 23:46:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:46:57,760 INFO L225 Difference]: With dead ends: 657 [2021-12-17 23:46:57,760 INFO L226 Difference]: Without dead ends: 464 [2021-12-17 23:46:57,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:46:57,761 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 111 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:46:57,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 490 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 23:46:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-17 23:46:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2021-12-17 23:46:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 321 states have (on average 1.0903426791277258) internal successors, (350), 330 states have internal predecessors, (350), 98 states have call successors, (98), 37 states have call predecessors, (98), 44 states have return successors, (127), 96 states have call predecessors, (127), 97 states have call successors, (127) [2021-12-17 23:46:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 575 transitions. [2021-12-17 23:46:57,788 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 575 transitions. Word has length 141 [2021-12-17 23:46:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:46:57,788 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 575 transitions. [2021-12-17 23:46:57,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:46:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 575 transitions. [2021-12-17 23:46:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 23:46:57,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:46:57,790 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:46:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 23:46:57,791 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:46:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:46:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -889596246, now seen corresponding path program 1 times [2021-12-17 23:46:57,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:46:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530074495] [2021-12-17 23:46:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:57,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:46:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:46:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:46:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:46:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:46:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:46:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:46:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:46:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:46:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:46:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:46:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:46:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:46:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 23:46:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 23:46:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:46:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 23:46:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-17 23:46:58,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:46:58,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530074495] [2021-12-17 23:46:58,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530074495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:46:58,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311699552] [2021-12-17 23:46:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:46:58,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:46:58,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:46:58,355 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:46:58,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 23:46:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:46:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 23:46:58,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:46:59,301 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:46:59,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-17 23:46:59,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:47:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 115 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 23:47:00,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:47:00,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311699552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:00,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:47:00,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-12-17 23:47:00,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964232437] [2021-12-17 23:47:00,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:47:00,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 23:47:00,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 23:47:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1339, Unknown=9, NotChecked=0, Total=1482 [2021-12-17 23:47:00,600 INFO L87 Difference]: Start difference. First operand 464 states and 575 transitions. Second operand has 33 states, 31 states have (on average 4.774193548387097) internal successors, (148), 29 states have internal predecessors, (148), 16 states have call successors, (35), 6 states have call predecessors, (35), 8 states have return successors, (32), 13 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-17 23:47:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:03,671 INFO L93 Difference]: Finished difference Result 918 states and 1175 transitions. [2021-12-17 23:47:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:47:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 4.774193548387097) internal successors, (148), 29 states have internal predecessors, (148), 16 states have call successors, (35), 6 states have call predecessors, (35), 8 states have return successors, (32), 13 states have call predecessors, (32), 16 states have call successors, (32) Word has length 146 [2021-12-17 23:47:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:03,675 INFO L225 Difference]: With dead ends: 918 [2021-12-17 23:47:03,675 INFO L226 Difference]: Without dead ends: 650 [2021-12-17 23:47:03,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 236 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=365, Invalid=3406, Unknown=11, NotChecked=0, Total=3782 [2021-12-17 23:47:03,678 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 333 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 5048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:03,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1373 Invalid, 5048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4230 Invalid, 0 Unknown, 520 Unchecked, 2.4s Time] [2021-12-17 23:47:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-12-17 23:47:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 582. [2021-12-17 23:47:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 401 states have (on average 1.0798004987531171) internal successors, (433), 407 states have internal predecessors, (433), 128 states have call successors, (128), 48 states have call predecessors, (128), 52 states have return successors, (162), 126 states have call predecessors, (162), 127 states have call successors, (162) [2021-12-17 23:47:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 723 transitions. [2021-12-17 23:47:03,736 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 723 transitions. Word has length 146 [2021-12-17 23:47:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:03,736 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 723 transitions. [2021-12-17 23:47:03,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 4.774193548387097) internal successors, (148), 29 states have internal predecessors, (148), 16 states have call successors, (35), 6 states have call predecessors, (35), 8 states have return successors, (32), 13 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-17 23:47:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 723 transitions. [2021-12-17 23:47:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:47:03,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:03,739 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:03,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 23:47:03,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:03,964 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -231322215, now seen corresponding path program 1 times [2021-12-17 23:47:03,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:03,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501493774] [2021-12-17 23:47:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:03,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:47:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:47:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:47:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:47:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:47:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 23:47:04,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501493774] [2021-12-17 23:47:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501493774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526726960] [2021-12-17 23:47:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:04,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:47:04,928 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:47:04,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 23:47:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-17 23:47:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:47:05,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:47:06,018 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:47:06,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-12-17 23:47:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-17 23:47:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 23:47:08,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:47:11,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526726960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:11,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:47:11,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30] total 42 [2021-12-17 23:47:11,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081503013] [2021-12-17 23:47:11,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:47:11,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 23:47:11,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 23:47:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2632, Unknown=4, NotChecked=0, Total=2862 [2021-12-17 23:47:11,897 INFO L87 Difference]: Start difference. First operand 582 states and 723 transitions. Second operand has 42 states, 39 states have (on average 4.153846153846154) internal successors, (162), 38 states have internal predecessors, (162), 14 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-17 23:47:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:16,526 INFO L93 Difference]: Finished difference Result 884 states and 1098 transitions. [2021-12-17 23:47:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 23:47:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 4.153846153846154) internal successors, (162), 38 states have internal predecessors, (162), 14 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) Word has length 141 [2021-12-17 23:47:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:16,531 INFO L225 Difference]: With dead ends: 884 [2021-12-17 23:47:16,531 INFO L226 Difference]: Without dead ends: 705 [2021-12-17 23:47:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 209 SyntacticMatches, 17 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=780, Invalid=8918, Unknown=4, NotChecked=0, Total=9702 [2021-12-17 23:47:16,534 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 471 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1855 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:16,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 2492 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2801 Invalid, 0 Unknown, 1855 Unchecked, 1.8s Time] [2021-12-17 23:47:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-12-17 23:47:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 624. [2021-12-17 23:47:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 439 states have (on average 1.0683371298405466) internal successors, (469), 443 states have internal predecessors, (469), 128 states have call successors, (128), 54 states have call predecessors, (128), 56 states have return successors, (156), 126 states have call predecessors, (156), 127 states have call successors, (156) [2021-12-17 23:47:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 753 transitions. [2021-12-17 23:47:16,600 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 753 transitions. Word has length 141 [2021-12-17 23:47:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:16,601 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 753 transitions. [2021-12-17 23:47:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 4.153846153846154) internal successors, (162), 38 states have internal predecessors, (162), 14 states have call successors, (30), 8 states have call predecessors, (30), 10 states have return successors, (28), 10 states have call predecessors, (28), 13 states have call successors, (28) [2021-12-17 23:47:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 753 transitions. [2021-12-17 23:47:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 23:47:16,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:16,603 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:16,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 23:47:16,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:16,830 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1490074470, now seen corresponding path program 1 times [2021-12-17 23:47:16,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012708368] [2021-12-17 23:47:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:16,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:47:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:47:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:47:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:47:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:47:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-17 23:47:17,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:17,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012708368] [2021-12-17 23:47:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012708368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:47:17,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:47:17,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 23:47:17,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044969433] [2021-12-17 23:47:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:47:17,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 23:47:17,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 23:47:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:47:17,088 INFO L87 Difference]: Start difference. First operand 624 states and 753 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:47:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:17,713 INFO L93 Difference]: Finished difference Result 634 states and 764 transitions. [2021-12-17 23:47:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:47:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 143 [2021-12-17 23:47:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:17,716 INFO L225 Difference]: With dead ends: 634 [2021-12-17 23:47:17,716 INFO L226 Difference]: Without dead ends: 632 [2021-12-17 23:47:17,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:47:17,717 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 118 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:17,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1026 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:47:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-17 23:47:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2021-12-17 23:47:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 442 states have (on average 1.0678733031674208) internal successors, (472), 446 states have internal predecessors, (472), 130 states have call successors, (130), 55 states have call predecessors, (130), 57 states have return successors, (158), 128 states have call predecessors, (158), 129 states have call successors, (158) [2021-12-17 23:47:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 760 transitions. [2021-12-17 23:47:17,755 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 760 transitions. Word has length 143 [2021-12-17 23:47:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:17,755 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 760 transitions. [2021-12-17 23:47:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:47:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 760 transitions. [2021-12-17 23:47:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 23:47:17,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:17,758 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:17,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 23:47:17,758 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 272043145, now seen corresponding path program 1 times [2021-12-17 23:47:17,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:17,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226868323] [2021-12-17 23:47:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:17,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:47:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:47:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:47:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:47:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 23:47:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 23:47:18,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226868323] [2021-12-17 23:47:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226868323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908262213] [2021-12-17 23:47:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:18,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:47:18,368 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:47:18,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 23:47:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-17 23:47:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:47:18,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:47:19,027 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 23:47:19,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 23:47:19,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:47:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 23:47:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-17 23:47:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 69 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 23:47:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:47:41,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_1685) |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.offset|))) (<= .cse0 (+ (* 18446744073709551616 (div (+ .cse0 (- 1)) 18446744073709551616)) 18446744073709551615)))) is different from false [2021-12-17 23:47:41,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908262213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:41,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:47:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2021-12-17 23:47:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581390271] [2021-12-17 23:47:41,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:47:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 23:47:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 23:47:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2343, Unknown=3, NotChecked=98, Total=2652 [2021-12-17 23:47:41,176 INFO L87 Difference]: Start difference. First operand 630 states and 760 transitions. Second operand has 41 states, 39 states have (on average 4.205128205128205) internal successors, (164), 36 states have internal predecessors, (164), 15 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-17 23:47:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:44,810 INFO L93 Difference]: Finished difference Result 1046 states and 1306 transitions. [2021-12-17 23:47:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:47:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.205128205128205) internal successors, (164), 36 states have internal predecessors, (164), 15 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) Word has length 143 [2021-12-17 23:47:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:44,815 INFO L225 Difference]: With dead ends: 1046 [2021-12-17 23:47:44,815 INFO L226 Difference]: Without dead ends: 787 [2021-12-17 23:47:44,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 215 SyntacticMatches, 20 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=480, Invalid=5373, Unknown=3, NotChecked=150, Total=6006 [2021-12-17 23:47:44,821 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 354 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 7732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2759 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:44,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 2279 Invalid, 7732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 4656 Invalid, 0 Unknown, 2759 Unchecked, 2.7s Time] [2021-12-17 23:47:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-17 23:47:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 681. [2021-12-17 23:47:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 486 states have (on average 1.0699588477366255) internal successors, (520), 490 states have internal predecessors, (520), 132 states have call successors, (132), 60 states have call predecessors, (132), 62 states have return successors, (158), 130 states have call predecessors, (158), 131 states have call successors, (158) [2021-12-17 23:47:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 810 transitions. [2021-12-17 23:47:44,873 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 810 transitions. Word has length 143 [2021-12-17 23:47:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 810 transitions. [2021-12-17 23:47:44,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.205128205128205) internal successors, (164), 36 states have internal predecessors, (164), 15 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-17 23:47:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 810 transitions. [2021-12-17 23:47:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 23:47:44,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:44,876 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:44,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 23:47:45,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:45,102 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1165529483, now seen corresponding path program 1 times [2021-12-17 23:47:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769352972] [2021-12-17 23:47:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:45,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:47:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:47:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:47:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:47:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 23:47:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-17 23:47:45,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769352972] [2021-12-17 23:47:45,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769352972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481326535] [2021-12-17 23:47:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:45,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:47:45,735 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:47:45,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 23:47:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-17 23:47:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:47:46,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:47:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:47:46,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:47:46,792 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-17 23:47:46,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 23:47:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:47:46,805 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-17 23:47:46,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2021-12-17 23:47:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:49,740 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-17 23:47:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 13 [2021-12-17 23:47:50,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:47:50,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-12-17 23:47:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:47:50,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:47:50,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481326535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:50,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:47:50,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 43] total 58 [2021-12-17 23:47:50,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175869790] [2021-12-17 23:47:50,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:47:50,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-17 23:47:50,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:50,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-17 23:47:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3909, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 23:47:50,756 INFO L87 Difference]: Start difference. First operand 681 states and 810 transitions. Second operand has 58 states, 51 states have (on average 3.4901960784313726) internal successors, (178), 50 states have internal predecessors, (178), 18 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2021-12-17 23:47:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:53,626 INFO L93 Difference]: Finished difference Result 907 states and 1074 transitions. [2021-12-17 23:47:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-17 23:47:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 51 states have (on average 3.4901960784313726) internal successors, (178), 50 states have internal predecessors, (178), 18 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) Word has length 143 [2021-12-17 23:47:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:53,630 INFO L225 Difference]: With dead ends: 907 [2021-12-17 23:47:53,630 INFO L226 Difference]: Without dead ends: 895 [2021-12-17 23:47:53,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 135 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=551, Invalid=11005, Unknown=0, NotChecked=0, Total=11556 [2021-12-17 23:47:53,633 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 172 mSDsluCounter, 4446 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 4679 SdHoareTripleChecker+Invalid, 4730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2659 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:53,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 4679 Invalid, 4730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1985 Invalid, 0 Unknown, 2659 Unchecked, 1.0s Time] [2021-12-17 23:47:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-12-17 23:47:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 841. [2021-12-17 23:47:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 611 states have (on average 1.072013093289689) internal successors, (655), 616 states have internal predecessors, (655), 152 states have call successors, (152), 75 states have call predecessors, (152), 77 states have return successors, (184), 149 states have call predecessors, (184), 151 states have call successors, (184) [2021-12-17 23:47:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 991 transitions. [2021-12-17 23:47:53,684 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 991 transitions. Word has length 143 [2021-12-17 23:47:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:53,685 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 991 transitions. [2021-12-17 23:47:53,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 51 states have (on average 3.4901960784313726) internal successors, (178), 50 states have internal predecessors, (178), 18 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2021-12-17 23:47:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 991 transitions. [2021-12-17 23:47:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 23:47:53,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:53,687 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:53,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-17 23:47:53,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 23:47:53,905 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 153601671, now seen corresponding path program 1 times [2021-12-17 23:47:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:53,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595287381] [2021-12-17 23:47:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:53,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:47:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:47:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:47:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:47:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 23:47:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-17 23:47:54,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:54,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595287381] [2021-12-17 23:47:54,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595287381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:47:54,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:47:54,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-17 23:47:54,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005930418] [2021-12-17 23:47:54,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:47:54,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:47:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:47:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:47:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:47:54,363 INFO L87 Difference]: Start difference. First operand 841 states and 991 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-17 23:47:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:47:55,440 INFO L93 Difference]: Finished difference Result 859 states and 1015 transitions. [2021-12-17 23:47:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 23:47:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 143 [2021-12-17 23:47:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:47:55,444 INFO L225 Difference]: With dead ends: 859 [2021-12-17 23:47:55,444 INFO L226 Difference]: Without dead ends: 857 [2021-12-17 23:47:55,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-12-17 23:47:55,445 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 216 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:47:55,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 502 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 23:47:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-12-17 23:47:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 815. [2021-12-17 23:47:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 596 states have (on average 1.0687919463087248) internal successors, (637), 602 states have internal predecessors, (637), 142 states have call successors, (142), 73 states have call predecessors, (142), 76 states have return successors, (173), 139 states have call predecessors, (173), 141 states have call successors, (173) [2021-12-17 23:47:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 952 transitions. [2021-12-17 23:47:55,509 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 952 transitions. Word has length 143 [2021-12-17 23:47:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:47:55,509 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 952 transitions. [2021-12-17 23:47:55,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-17 23:47:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 952 transitions. [2021-12-17 23:47:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 23:47:55,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:47:55,511 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:47:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 23:47:55,512 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:47:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:47:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1595812768, now seen corresponding path program 1 times [2021-12-17 23:47:55,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:47:55,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956882580] [2021-12-17 23:47:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:55,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:47:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:47:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:47:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:47:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:47:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:47:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:47:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:47:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:47:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:47:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:47:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:47:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:47:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:47:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 23:47:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:47:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 23:47:56,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:47:56,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956882580] [2021-12-17 23:47:56,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956882580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:47:56,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463511488] [2021-12-17 23:47:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:47:56,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:47:56,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:47:56,509 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:47:56,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 23:47:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:47:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-17 23:47:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:47:57,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:47:58,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:47:58,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-17 23:47:58,040 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:47:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-17 23:47:58,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-17 23:47:58,629 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-17 23:47:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-12-17 23:48:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 60 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 23:48:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:48:01,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463511488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:48:01,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:48:01,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 37] total 57 [2021-12-17 23:48:01,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675200114] [2021-12-17 23:48:01,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:48:01,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 23:48:01,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:48:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 23:48:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=5723, Unknown=3, NotChecked=0, Total=6006 [2021-12-17 23:48:01,885 INFO L87 Difference]: Start difference. First operand 815 states and 952 transitions. Second operand has 57 states, 53 states have (on average 3.056603773584906) internal successors, (162), 47 states have internal predecessors, (162), 17 states have call successors, (31), 8 states have call predecessors, (31), 11 states have return successors, (28), 15 states have call predecessors, (28), 15 states have call successors, (28) [2021-12-17 23:48:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:48:06,506 INFO L93 Difference]: Finished difference Result 942 states and 1110 transitions. [2021-12-17 23:48:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-17 23:48:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 3.056603773584906) internal successors, (162), 47 states have internal predecessors, (162), 17 states have call successors, (31), 8 states have call predecessors, (31), 11 states have return successors, (28), 15 states have call predecessors, (28), 15 states have call successors, (28) Word has length 143 [2021-12-17 23:48:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:48:06,510 INFO L225 Difference]: With dead ends: 942 [2021-12-17 23:48:06,510 INFO L226 Difference]: Without dead ends: 923 [2021-12-17 23:48:06,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 193 SyntacticMatches, 18 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=737, Invalid=15772, Unknown=3, NotChecked=0, Total=16512 [2021-12-17 23:48:06,513 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 321 mSDsluCounter, 3241 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 6826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1797 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:48:06,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 3490 Invalid, 6826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 4786 Invalid, 0 Unknown, 1797 Unchecked, 2.3s Time] [2021-12-17 23:48:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-12-17 23:48:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 886. [2021-12-17 23:48:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 649 states have (on average 1.0677966101694916) internal successors, (693), 656 states have internal predecessors, (693), 153 states have call successors, (153), 80 states have call predecessors, (153), 83 states have return successors, (187), 149 states have call predecessors, (187), 152 states have call successors, (187) [2021-12-17 23:48:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1033 transitions. [2021-12-17 23:48:06,568 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1033 transitions. Word has length 143 [2021-12-17 23:48:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:48:06,569 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1033 transitions. [2021-12-17 23:48:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 3.056603773584906) internal successors, (162), 47 states have internal predecessors, (162), 17 states have call successors, (31), 8 states have call predecessors, (31), 11 states have return successors, (28), 15 states have call predecessors, (28), 15 states have call successors, (28) [2021-12-17 23:48:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1033 transitions. [2021-12-17 23:48:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-17 23:48:06,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:48:06,571 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:48:06,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 23:48:06,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:48:06,787 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:48:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:48:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1897219041, now seen corresponding path program 1 times [2021-12-17 23:48:06,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:48:06,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212769628] [2021-12-17 23:48:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:48:06,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:48:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:48:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:48:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:48:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:48:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:48:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:48:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:48:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:48:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:48:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:48:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:48:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:48:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:48:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:48:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 23:48:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 23:48:07,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:48:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212769628] [2021-12-17 23:48:07,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212769628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:48:07,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:48:07,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 23:48:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707408662] [2021-12-17 23:48:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:48:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 23:48:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:48:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 23:48:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:48:07,023 INFO L87 Difference]: Start difference. First operand 886 states and 1033 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:48:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:48:07,623 INFO L93 Difference]: Finished difference Result 892 states and 1038 transitions. [2021-12-17 23:48:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:48:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 154 [2021-12-17 23:48:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:48:07,627 INFO L225 Difference]: With dead ends: 892 [2021-12-17 23:48:07,627 INFO L226 Difference]: Without dead ends: 890 [2021-12-17 23:48:07,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:48:07,628 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 117 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:48:07,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1034 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:48:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-17 23:48:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-12-17 23:48:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 652 states have (on average 1.0674846625766872) internal successors, (696), 659 states have internal predecessors, (696), 153 states have call successors, (153), 81 states have call predecessors, (153), 84 states have return successors, (187), 149 states have call predecessors, (187), 152 states have call successors, (187) [2021-12-17 23:48:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1036 transitions. [2021-12-17 23:48:07,681 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1036 transitions. Word has length 154 [2021-12-17 23:48:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:48:07,681 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1036 transitions. [2021-12-17 23:48:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-17 23:48:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1036 transitions. [2021-12-17 23:48:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 23:48:07,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:48:07,684 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:48:07,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 23:48:07,685 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:48:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:48:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 3591018, now seen corresponding path program 1 times [2021-12-17 23:48:07,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:48:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722289640] [2021-12-17 23:48:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:48:07,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:48:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:48:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:48:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:48:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:48:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:48:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:48:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:48:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:48:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:48:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:48:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:48:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 23:48:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 23:48:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:48:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-17 23:48:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 23:48:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 23:48:08,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:48:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722289640] [2021-12-17 23:48:08,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722289640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:48:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060090973] [2021-12-17 23:48:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:48:08,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:48:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:48:08,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:48:08,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 23:48:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 23:48:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:48:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:48:08,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:48:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 23:48:09,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:48:09,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060090973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:48:09,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:48:09,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 20 [2021-12-17 23:48:09,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851809614] [2021-12-17 23:48:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:48:09,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 23:48:09,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:48:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 23:48:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-17 23:48:09,501 INFO L87 Difference]: Start difference. First operand 890 states and 1036 transitions. Second operand has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 13 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 23:48:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:48:09,785 INFO L93 Difference]: Finished difference Result 1384 states and 1651 transitions. [2021-12-17 23:48:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:48:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 13 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 159 [2021-12-17 23:48:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:48:09,790 INFO L225 Difference]: With dead ends: 1384 [2021-12-17 23:48:09,791 INFO L226 Difference]: Without dead ends: 1101 [2021-12-17 23:48:09,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-17 23:48:09,793 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 47 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:48:09,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 2346 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2021-12-17 23:48:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-12-17 23:48:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1060. [2021-12-17 23:48:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 787 states have (on average 1.059720457433291) internal successors, (834), 795 states have internal predecessors, (834), 173 states have call successors, (173), 100 states have call predecessors, (173), 99 states have return successors, (211), 164 states have call predecessors, (211), 172 states have call successors, (211) [2021-12-17 23:48:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1218 transitions. [2021-12-17 23:48:09,857 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1218 transitions. Word has length 159 [2021-12-17 23:48:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:48:09,858 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1218 transitions. [2021-12-17 23:48:09,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 13 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 23:48:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1218 transitions. [2021-12-17 23:48:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 23:48:09,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:48:09,864 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:48:09,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 23:48:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:48:10,095 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:48:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:48:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash -570461933, now seen corresponding path program 1 times [2021-12-17 23:48:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:48:10,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621222112] [2021-12-17 23:48:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:48:10,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:48:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:48:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:48:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:48:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:48:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:48:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:48:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:48:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:48:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:48:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:48:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:48:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:48:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:48:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:48:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 23:48:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:48:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 23:48:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-17 23:48:10,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:48:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621222112] [2021-12-17 23:48:10,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621222112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:48:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310898446] [2021-12-17 23:48:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:48:10,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:48:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:48:10,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:48:10,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 23:48:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:48:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-17 23:48:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:48:11,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:48:11,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-17 23:48:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:48:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-17 23:48:11,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:48:12,114 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:48:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 23:48:31,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 23:49:14,397 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_buf_append_~to.base_BEFORE_CALL_55 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_append_~to.base_BEFORE_CALL_55) 8))) (and (< (+ .cse0 1) v_aws_byte_buf_append_~to.base_BEFORE_CALL_55) (not (= 0 .cse0))))) is different from true [2021-12-17 23:49:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 88 refuted. 0 times theorem prover too weak. 29 trivial. 6 not checked. [2021-12-17 23:49:19,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:49:20,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2077 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_2077) |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.offset| 8)) 0))) is different from false [2021-12-17 23:49:20,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310898446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:49:20,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:49:20,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 37] total 57 [2021-12-17 23:49:20,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689891715] [2021-12-17 23:49:20,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:49:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-17 23:49:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:49:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-17 23:49:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=4753, Unknown=7, NotChecked=278, Total=5256 [2021-12-17 23:49:20,572 INFO L87 Difference]: Start difference. First operand 1060 states and 1218 transitions. Second operand has 57 states, 53 states have (on average 3.69811320754717) internal successors, (196), 48 states have internal predecessors, (196), 16 states have call successors, (36), 10 states have call predecessors, (36), 11 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) [2021-12-17 23:49:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:49:30,919 INFO L93 Difference]: Finished difference Result 1376 states and 1602 transitions. [2021-12-17 23:49:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-17 23:49:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 3.69811320754717) internal successors, (196), 48 states have internal predecessors, (196), 16 states have call successors, (36), 10 states have call predecessors, (36), 11 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) Word has length 165 [2021-12-17 23:49:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:49:30,924 INFO L225 Difference]: With dead ends: 1376 [2021-12-17 23:49:30,924 INFO L226 Difference]: Without dead ends: 1365 [2021-12-17 23:49:30,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 224 SyntacticMatches, 25 SemanticMatches, 141 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5109 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=833, Invalid=18907, Unknown=8, NotChecked=558, Total=20306 [2021-12-17 23:49:30,926 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 332 mSDsluCounter, 3585 mSDsCounter, 0 mSdLazyCounter, 5417 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 3834 SdHoareTripleChecker+Invalid, 9201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3385 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:49:30,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 3834 Invalid, 9201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5417 Invalid, 0 Unknown, 3385 Unchecked, 2.7s Time] [2021-12-17 23:49:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-12-17 23:49:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1307. [2021-12-17 23:49:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 963 states have (on average 1.0612668743509865) internal successors, (1022), 970 states have internal predecessors, (1022), 224 states have call successors, (224), 123 states have call predecessors, (224), 119 states have return successors, (276), 213 states have call predecessors, (276), 223 states have call successors, (276) [2021-12-17 23:49:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1522 transitions. [2021-12-17 23:49:31,027 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1522 transitions. Word has length 165 [2021-12-17 23:49:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:49:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 1522 transitions. [2021-12-17 23:49:31,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 3.69811320754717) internal successors, (196), 48 states have internal predecessors, (196), 16 states have call successors, (36), 10 states have call predecessors, (36), 11 states have return successors, (33), 16 states have call predecessors, (33), 15 states have call successors, (33) [2021-12-17 23:49:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1522 transitions. [2021-12-17 23:49:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-17 23:49:31,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:49:31,033 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:49:31,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 23:49:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:49:31,255 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:49:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:49:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1420272077, now seen corresponding path program 1 times [2021-12-17 23:49:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:49:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785943469] [2021-12-17 23:49:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:31,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:49:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:49:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:49:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:49:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:49:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:49:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:49:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:49:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:49:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:49:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:49:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 23:49:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 23:49:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 23:49:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:49:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-17 23:49:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 23:49:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-17 23:49:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-17 23:49:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-17 23:49:31,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:49:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785943469] [2021-12-17 23:49:31,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785943469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:49:31,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:49:31,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:49:31,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317415737] [2021-12-17 23:49:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:49:31,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:49:31,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:49:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:49:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:49:31,454 INFO L87 Difference]: Start difference. First operand 1307 states and 1522 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:49:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:49:31,937 INFO L93 Difference]: Finished difference Result 1335 states and 1568 transitions. [2021-12-17 23:49:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:49:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 173 [2021-12-17 23:49:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:49:31,941 INFO L225 Difference]: With dead ends: 1335 [2021-12-17 23:49:31,941 INFO L226 Difference]: Without dead ends: 1333 [2021-12-17 23:49:31,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:49:31,942 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 105 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:49:31,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 814 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 23:49:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-12-17 23:49:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1322. [2021-12-17 23:49:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 969 states have (on average 1.060887512899897) internal successors, (1028), 977 states have internal predecessors, (1028), 231 states have call successors, (231), 124 states have call predecessors, (231), 121 states have return successors, (291), 220 states have call predecessors, (291), 230 states have call successors, (291) [2021-12-17 23:49:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1550 transitions. [2021-12-17 23:49:32,020 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1550 transitions. Word has length 173 [2021-12-17 23:49:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:49:32,021 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1550 transitions. [2021-12-17 23:49:32,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:49:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1550 transitions. [2021-12-17 23:49:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 23:49:32,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:49:32,025 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:49:32,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 23:49:32,025 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:49:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:49:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1275495245, now seen corresponding path program 1 times [2021-12-17 23:49:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:49:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628912609] [2021-12-17 23:49:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:32,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:49:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:49:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:49:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:49:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:49:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:49:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:49:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:49:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:49:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:49:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:49:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 23:49:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 23:49:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 23:49:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:49:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 23:49:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 23:49:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 23:49:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-17 23:49:32,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:49:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628912609] [2021-12-17 23:49:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628912609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:49:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692955744] [2021-12-17 23:49:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:32,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:49:32,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:49:32,363 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:49:32,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 23:49:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2781 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 23:49:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:49:32,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:49:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 23:49:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:49:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-17 23:49:34,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692955744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:49:34,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:49:34,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 25 [2021-12-17 23:49:34,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906438459] [2021-12-17 23:49:34,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:49:34,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 23:49:34,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:49:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 23:49:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-12-17 23:49:34,166 INFO L87 Difference]: Start difference. First operand 1322 states and 1550 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 22 states have internal predecessors, (135), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-17 23:49:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:49:35,921 INFO L93 Difference]: Finished difference Result 1593 states and 1905 transitions. [2021-12-17 23:49:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 23:49:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 22 states have internal predecessors, (135), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) Word has length 166 [2021-12-17 23:49:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:49:35,929 INFO L225 Difference]: With dead ends: 1593 [2021-12-17 23:49:35,929 INFO L226 Difference]: Without dead ends: 1440 [2021-12-17 23:49:35,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 338 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 23:49:35,931 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 220 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:49:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1482 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2045 Invalid, 0 Unknown, 505 Unchecked, 1.2s Time] [2021-12-17 23:49:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-12-17 23:49:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1328. [2021-12-17 23:49:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 980 states have (on average 1.0571428571428572) internal successors, (1036), 990 states have internal predecessors, (1036), 223 states have call successors, (223), 125 states have call predecessors, (223), 124 states have return successors, (273), 212 states have call predecessors, (273), 222 states have call successors, (273) [2021-12-17 23:49:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1532 transitions. [2021-12-17 23:49:36,024 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1532 transitions. Word has length 166 [2021-12-17 23:49:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:49:36,024 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1532 transitions. [2021-12-17 23:49:36,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 22 states have internal predecessors, (135), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-17 23:49:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1532 transitions. [2021-12-17 23:49:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-17 23:49:36,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:49:36,029 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:49:36,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-17 23:49:36,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:49:36,243 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:49:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:49:36,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1156580671, now seen corresponding path program 1 times [2021-12-17 23:49:36,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:49:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191465765] [2021-12-17 23:49:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:36,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:49:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:49:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:49:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:49:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:49:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:49:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:49:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:49:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:49:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:49:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:49:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 23:49:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:36,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:49:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:49:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:49:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:49:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:49:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:49:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:49:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:49:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-17 23:49:37,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:49:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191465765] [2021-12-17 23:49:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191465765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:49:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904015818] [2021-12-17 23:49:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:37,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:49:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:49:37,311 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:49:37,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 23:49:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-17 23:49:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:49:39,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:49:39,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 23:49:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:49:39,443 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 23:49:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-12-17 23:49:40,936 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-12-17 23:49:40,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 43 [2021-12-17 23:49:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 84 proven. 47 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 23:49:41,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:49:42,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904015818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:49:42,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:49:42,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 44 [2021-12-17 23:49:42,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477878514] [2021-12-17 23:49:42,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:49:42,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 23:49:42,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:49:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 23:49:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2189, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 23:49:42,329 INFO L87 Difference]: Start difference. First operand 1328 states and 1532 transitions. Second operand has 44 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 18 states have call successors, (42), 6 states have call predecessors, (42), 6 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-12-17 23:49:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:49:45,561 INFO L93 Difference]: Finished difference Result 1381 states and 1589 transitions. [2021-12-17 23:49:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 23:49:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 18 states have call successors, (42), 6 states have call predecessors, (42), 6 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 183 [2021-12-17 23:49:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:49:45,568 INFO L225 Difference]: With dead ends: 1381 [2021-12-17 23:49:45,568 INFO L226 Difference]: Without dead ends: 1379 [2021-12-17 23:49:45,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 196 SyntacticMatches, 28 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=582, Invalid=6558, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 23:49:45,570 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 354 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 3541 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 3541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:49:45,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1645 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 3541 Invalid, 0 Unknown, 556 Unchecked, 1.8s Time] [2021-12-17 23:49:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-12-17 23:49:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1354. [2021-12-17 23:49:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1000 states have (on average 1.057) internal successors, (1057), 1010 states have internal predecessors, (1057), 224 states have call successors, (224), 130 states have call predecessors, (224), 129 states have return successors, (274), 213 states have call predecessors, (274), 223 states have call successors, (274) [2021-12-17 23:49:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1555 transitions. [2021-12-17 23:49:45,652 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1555 transitions. Word has length 183 [2021-12-17 23:49:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:49:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1555 transitions. [2021-12-17 23:49:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 18 states have call successors, (42), 6 states have call predecessors, (42), 6 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-12-17 23:49:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1555 transitions. [2021-12-17 23:49:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 23:49:45,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:49:45,657 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:49:45,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 23:49:45,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 23:49:45,875 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:49:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:49:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1715697516, now seen corresponding path program 1 times [2021-12-17 23:49:45,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:49:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417337381] [2021-12-17 23:49:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:45,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:49:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:49:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:49:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:49:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:49:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:49:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:49:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:49:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:49:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:49:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:49:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:49:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:49:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:49:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:49:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:49:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:49:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:49:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:49:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-17 23:49:46,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:49:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417337381] [2021-12-17 23:49:46,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417337381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:49:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587535695] [2021-12-17 23:49:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:49:46,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:49:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:49:46,723 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:49:46,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 23:49:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:49:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-17 23:49:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:49:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:49:48,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:49:50,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 23:49:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:49:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:49:55,269 INFO L354 Elim1Store]: treesize reduction 51, result has 27.1 percent of original size [2021-12-17 23:49:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 59 [2021-12-17 23:49:57,483 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_108| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_10| Int)) (let ((.cse3 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_10|))) (let ((.cse2 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_108|)) (.cse1 (mod .cse3 18446744073709551616))) (and (or (let ((.cse0 (select .cse2 16))) (< (div (+ (* .cse0 (- 1)) 18446744073709551615) (- 18446744073709551616)) (+ (div (+ (* .cse1 (- 1)) .cse0) 18446744073709551616) 1))) (not (= |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_108| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_10|))) (= (select .cse2 0) .cse3) (not (= 0 .cse1)))))) is different from true [2021-12-17 23:50:12,498 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-12-17 23:50:12,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 59 [2021-12-17 23:50:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 53 proven. 72 refuted. 1 times theorem prover too weak. 40 trivial. 1 not checked. [2021-12-17 23:50:12,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:50:14,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587535695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:50:14,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:50:14,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35] total 51 [2021-12-17 23:50:14,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065085676] [2021-12-17 23:50:14,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:50:14,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 23:50:14,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:50:14,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 23:50:14,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2658, Unknown=9, NotChecked=104, Total=2970 [2021-12-17 23:50:14,802 INFO L87 Difference]: Start difference. First operand 1354 states and 1555 transitions. Second operand has 51 states, 46 states have (on average 3.282608695652174) internal successors, (151), 44 states have internal predecessors, (151), 23 states have call successors, (36), 9 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-17 23:51:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:01,828 INFO L93 Difference]: Finished difference Result 1634 states and 1912 transitions. [2021-12-17 23:51:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-17 23:51:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 46 states have (on average 3.282608695652174) internal successors, (151), 44 states have internal predecessors, (151), 23 states have call successors, (36), 9 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 21 states have call successors, (34) Word has length 167 [2021-12-17 23:51:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:01,833 INFO L225 Difference]: With dead ends: 1634 [2021-12-17 23:51:01,833 INFO L226 Difference]: Without dead ends: 1547 [2021-12-17 23:51:01,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 186 SyntacticMatches, 22 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=965, Invalid=11676, Unknown=19, NotChecked=222, Total=12882 [2021-12-17 23:51:01,835 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 696 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 6763 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 9619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 6763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2213 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:01,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 1474 Invalid, 9619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 6763 Invalid, 0 Unknown, 2213 Unchecked, 4.0s Time] [2021-12-17 23:51:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-12-17 23:51:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1463. [2021-12-17 23:51:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1085 states have (on average 1.0571428571428572) internal successors, (1147), 1098 states have internal predecessors, (1147), 239 states have call successors, (239), 136 states have call predecessors, (239), 138 states have return successors, (292), 228 states have call predecessors, (292), 238 states have call successors, (292) [2021-12-17 23:51:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1678 transitions. [2021-12-17 23:51:01,932 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1678 transitions. Word has length 167 [2021-12-17 23:51:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:01,932 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 1678 transitions. [2021-12-17 23:51:01,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 46 states have (on average 3.282608695652174) internal successors, (151), 44 states have internal predecessors, (151), 23 states have call successors, (36), 9 states have call predecessors, (36), 10 states have return successors, (34), 17 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-17 23:51:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1678 transitions. [2021-12-17 23:51:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 23:51:01,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:01,937 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:01,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:02,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-17 23:51:02,148 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1412595227, now seen corresponding path program 1 times [2021-12-17 23:51:02,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:02,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739359311] [2021-12-17 23:51:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:02,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:51:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:51:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:51:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:51:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:51:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:51:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-17 23:51:02,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739359311] [2021-12-17 23:51:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739359311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:02,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:02,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:51:02,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547206138] [2021-12-17 23:51:02,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:02,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:51:02,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:51:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:51:02,351 INFO L87 Difference]: Start difference. First operand 1463 states and 1678 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:02,783 INFO L93 Difference]: Finished difference Result 1602 states and 1843 transitions. [2021-12-17 23:51:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:51:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 169 [2021-12-17 23:51:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:02,787 INFO L225 Difference]: With dead ends: 1602 [2021-12-17 23:51:02,787 INFO L226 Difference]: Without dead ends: 1456 [2021-12-17 23:51:02,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:51:02,788 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 178 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:02,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 401 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 23:51:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-17 23:51:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1447. [2021-12-17 23:51:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1077 states have (on average 1.053853296193129) internal successors, (1135), 1090 states have internal predecessors, (1135), 231 states have call successors, (231), 136 states have call predecessors, (231), 138 states have return successors, (284), 220 states have call predecessors, (284), 230 states have call successors, (284) [2021-12-17 23:51:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 1650 transitions. [2021-12-17 23:51:02,864 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 1650 transitions. Word has length 169 [2021-12-17 23:51:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:02,864 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 1650 transitions. [2021-12-17 23:51:02,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 1650 transitions. [2021-12-17 23:51:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 23:51:02,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:02,869 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:02,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 23:51:02,869 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:02,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2145241863, now seen corresponding path program 1 times [2021-12-17 23:51:02,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:02,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559822332] [2021-12-17 23:51:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:02,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:51:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:51:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:51:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:51:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:51:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:51:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:51:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 23:51:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-17 23:51:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-17 23:51:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-17 23:51:03,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559822332] [2021-12-17 23:51:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559822332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:03,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:51:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909516747] [2021-12-17 23:51:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:51:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:51:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:51:03,105 INFO L87 Difference]: Start difference. First operand 1447 states and 1650 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:03,738 INFO L93 Difference]: Finished difference Result 1469 states and 1682 transitions. [2021-12-17 23:51:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:51:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 184 [2021-12-17 23:51:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:03,743 INFO L225 Difference]: With dead ends: 1469 [2021-12-17 23:51:03,743 INFO L226 Difference]: Without dead ends: 1467 [2021-12-17 23:51:03,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:51:03,744 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 105 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:03,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 814 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:51:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-12-17 23:51:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1461. [2021-12-17 23:51:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1083 states have (on average 1.0535549399815327) internal successors, (1141), 1097 states have internal predecessors, (1141), 237 states have call successors, (237), 137 states have call predecessors, (237), 140 states have return successors, (296), 226 states have call predecessors, (296), 236 states have call successors, (296) [2021-12-17 23:51:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1674 transitions. [2021-12-17 23:51:03,835 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1674 transitions. Word has length 184 [2021-12-17 23:51:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:03,836 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1674 transitions. [2021-12-17 23:51:03,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1674 transitions. [2021-12-17 23:51:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 23:51:03,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:03,840 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:03,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 23:51:03,840 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1944011148, now seen corresponding path program 1 times [2021-12-17 23:51:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036213248] [2021-12-17 23:51:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:03,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:51:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:51:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:51:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:51:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:51:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:51:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:51:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:51:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:51:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:51:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 23:51:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 23:51:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:04,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-17 23:51:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-17 23:51:04,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036213248] [2021-12-17 23:51:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036213248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272177354] [2021-12-17 23:51:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:04,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:04,018 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:04,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 23:51:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 2804 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:51:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 23:51:04,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:51:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272177354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:04,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:51:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-17 23:51:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646607028] [2021-12-17 23:51:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:04,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:51:04,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:51:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:51:04,683 INFO L87 Difference]: Start difference. First operand 1461 states and 1674 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-17 23:51:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:04,747 INFO L93 Difference]: Finished difference Result 1932 states and 2242 transitions. [2021-12-17 23:51:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:51:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 172 [2021-12-17 23:51:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:04,751 INFO L225 Difference]: With dead ends: 1932 [2021-12-17 23:51:04,751 INFO L226 Difference]: Without dead ends: 1110 [2021-12-17 23:51:04,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:51:04,754 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 6 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:04,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 639 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:51:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-12-17 23:51:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1098. [2021-12-17 23:51:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 813 states have (on average 1.051660516605166) internal successors, (855), 825 states have internal predecessors, (855), 174 states have call successors, (174), 104 states have call predecessors, (174), 110 states have return successors, (207), 168 states have call predecessors, (207), 173 states have call successors, (207) [2021-12-17 23:51:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1236 transitions. [2021-12-17 23:51:04,822 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1236 transitions. Word has length 172 [2021-12-17 23:51:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:04,822 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1236 transitions. [2021-12-17 23:51:04,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-17 23:51:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1236 transitions. [2021-12-17 23:51:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 23:51:04,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:04,825 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:04,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:05,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 23:51:05,039 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash 420149263, now seen corresponding path program 1 times [2021-12-17 23:51:05,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760928400] [2021-12-17 23:51:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:05,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:51:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:51:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:51:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:51:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:51:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:51:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:51:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 23:51:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-17 23:51:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-17 23:51:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-17 23:51:05,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760928400] [2021-12-17 23:51:05,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760928400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506080114] [2021-12-17 23:51:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:05,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:05,647 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:05,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 23:51:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 23:51:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:06,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 23:51:07,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:51:07,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506080114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:07,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:51:07,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-12-17 23:51:07,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280417277] [2021-12-17 23:51:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:07,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 23:51:07,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 23:51:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-17 23:51:07,169 INFO L87 Difference]: Start difference. First operand 1098 states and 1236 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:51:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:07,353 INFO L93 Difference]: Finished difference Result 1329 states and 1501 transitions. [2021-12-17 23:51:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:51:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 188 [2021-12-17 23:51:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:07,358 INFO L225 Difference]: With dead ends: 1329 [2021-12-17 23:51:07,358 INFO L226 Difference]: Without dead ends: 1191 [2021-12-17 23:51:07,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 198 SyntacticMatches, 18 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-12-17 23:51:07,359 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 68 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:07,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1405 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 144 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2021-12-17 23:51:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-12-17 23:51:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1154. [2021-12-17 23:51:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 861 states have (on average 1.0476190476190477) internal successors, (902), 873 states have internal predecessors, (902), 176 states have call successors, (176), 110 states have call predecessors, (176), 116 states have return successors, (209), 170 states have call predecessors, (209), 175 states have call successors, (209) [2021-12-17 23:51:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1287 transitions. [2021-12-17 23:51:07,443 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1287 transitions. Word has length 188 [2021-12-17 23:51:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:07,444 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1287 transitions. [2021-12-17 23:51:07,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:51:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1287 transitions. [2021-12-17 23:51:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 23:51:07,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:07,447 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:07,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:07,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:07,664 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash 678314701, now seen corresponding path program 1 times [2021-12-17 23:51:07,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325777802] [2021-12-17 23:51:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:07,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:51:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:51:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:51:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:51:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:51:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:51:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:51:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 23:51:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-17 23:51:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-17 23:51:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-17 23:51:07,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325777802] [2021-12-17 23:51:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325777802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:07,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:07,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:51:07,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187438428] [2021-12-17 23:51:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:07,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:51:07,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:51:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:51:07,897 INFO L87 Difference]: Start difference. First operand 1154 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:08,224 INFO L93 Difference]: Finished difference Result 1316 states and 1488 transitions. [2021-12-17 23:51:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:51:08,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 188 [2021-12-17 23:51:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:08,228 INFO L225 Difference]: With dead ends: 1316 [2021-12-17 23:51:08,228 INFO L226 Difference]: Without dead ends: 1148 [2021-12-17 23:51:08,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:51:08,229 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 96 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:08,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 401 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 23:51:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-12-17 23:51:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1147. [2021-12-17 23:51:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 854 states have (on average 1.0421545667447307) internal successors, (890), 866 states have internal predecessors, (890), 176 states have call successors, (176), 110 states have call predecessors, (176), 116 states have return successors, (208), 170 states have call predecessors, (208), 175 states have call successors, (208) [2021-12-17 23:51:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1274 transitions. [2021-12-17 23:51:08,319 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1274 transitions. Word has length 188 [2021-12-17 23:51:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:08,320 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1274 transitions. [2021-12-17 23:51:08,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:51:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1274 transitions. [2021-12-17 23:51:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 23:51:08,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:08,323 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 23:51:08,323 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 295587665, now seen corresponding path program 1 times [2021-12-17 23:51:08,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:08,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264921521] [2021-12-17 23:51:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:08,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:51:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:51:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:51:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:51:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:51:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:51:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:51:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 23:51:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-17 23:51:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-17 23:51:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-17 23:51:08,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264921521] [2021-12-17 23:51:08,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264921521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403260926] [2021-12-17 23:51:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:08,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:08,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:08,976 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:08,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 23:51:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 23:51:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 23:51:10,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:51:10,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403260926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:10,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:51:10,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-12-17 23:51:10,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035088021] [2021-12-17 23:51:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:10,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 23:51:10,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 23:51:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-17 23:51:10,456 INFO L87 Difference]: Start difference. First operand 1147 states and 1274 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:51:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:10,718 INFO L93 Difference]: Finished difference Result 1337 states and 1498 transitions. [2021-12-17 23:51:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:51:10,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 188 [2021-12-17 23:51:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:10,722 INFO L225 Difference]: With dead ends: 1337 [2021-12-17 23:51:10,722 INFO L226 Difference]: Without dead ends: 1197 [2021-12-17 23:51:10,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 198 SyntacticMatches, 18 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-12-17 23:51:10,723 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 56 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:10,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 2262 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 0 Unknown, 256 Unchecked, 0.2s Time] [2021-12-17 23:51:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-17 23:51:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1162. [2021-12-17 23:51:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 864 states have (on average 1.0381944444444444) internal successors, (897), 876 states have internal predecessors, (897), 180 states have call successors, (180), 110 states have call predecessors, (180), 117 states have return successors, (207), 175 states have call predecessors, (207), 179 states have call successors, (207) [2021-12-17 23:51:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1284 transitions. [2021-12-17 23:51:10,797 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1284 transitions. Word has length 188 [2021-12-17 23:51:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:10,797 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1284 transitions. [2021-12-17 23:51:10,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:51:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1284 transitions. [2021-12-17 23:51:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 23:51:10,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:10,800 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:10,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:11,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:11,027 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 443434595, now seen corresponding path program 1 times [2021-12-17 23:51:11,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230933443] [2021-12-17 23:51:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:11,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:51:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:51:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:51:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:51:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:51:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:51:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:51:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:51:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:51:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 23:51:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:51:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 23:51:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-17 23:51:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 23:51:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-17 23:51:11,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:11,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230933443] [2021-12-17 23:51:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230933443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:11,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:11,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 23:51:11,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344578497] [2021-12-17 23:51:11,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:11,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 23:51:11,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 23:51:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:51:11,344 INFO L87 Difference]: Start difference. First operand 1162 states and 1284 transitions. Second operand has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-17 23:51:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:12,209 INFO L93 Difference]: Finished difference Result 1178 states and 1301 transitions. [2021-12-17 23:51:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:51:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 185 [2021-12-17 23:51:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:12,212 INFO L225 Difference]: With dead ends: 1178 [2021-12-17 23:51:12,213 INFO L226 Difference]: Without dead ends: 1176 [2021-12-17 23:51:12,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-12-17 23:51:12,213 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 117 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:12,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1309 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 23:51:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-12-17 23:51:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1159. [2021-12-17 23:51:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 864 states have (on average 1.0381944444444444) internal successors, (897), 876 states have internal predecessors, (897), 177 states have call successors, (177), 110 states have call predecessors, (177), 117 states have return successors, (204), 172 states have call predecessors, (204), 176 states have call successors, (204) [2021-12-17 23:51:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1278 transitions. [2021-12-17 23:51:12,283 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1278 transitions. Word has length 185 [2021-12-17 23:51:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:12,283 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1278 transitions. [2021-12-17 23:51:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-17 23:51:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1278 transitions. [2021-12-17 23:51:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 23:51:12,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:12,286 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:12,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 23:51:12,287 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1849286885, now seen corresponding path program 1 times [2021-12-17 23:51:12,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682912338] [2021-12-17 23:51:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:12,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:51:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:51:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:51:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 23:51:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:12,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 23:51:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-17 23:51:13,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682912338] [2021-12-17 23:51:13,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682912338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753685568] [2021-12-17 23:51:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:13,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:13,125 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:13,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 23:51:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-17 23:51:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:13,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:13,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:14,427 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:51:14,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-17 23:51:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:51:14,438 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-17 23:51:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 23:51:14,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:51:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-17 23:51:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 73 proven. 93 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 23:51:15,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:51:16,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753685568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:16,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:51:16,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 40 [2021-12-17 23:51:16,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201504746] [2021-12-17 23:51:16,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:51:16,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 23:51:16,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 23:51:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 23:51:16,555 INFO L87 Difference]: Start difference. First operand 1159 states and 1278 transitions. Second operand has 40 states, 38 states have (on average 4.447368421052632) internal successors, (169), 35 states have internal predecessors, (169), 15 states have call successors, (43), 8 states have call predecessors, (43), 10 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-12-17 23:51:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:19,465 INFO L93 Difference]: Finished difference Result 1354 states and 1548 transitions. [2021-12-17 23:51:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 23:51:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.447368421052632) internal successors, (169), 35 states have internal predecessors, (169), 15 states have call successors, (43), 8 states have call predecessors, (43), 10 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 194 [2021-12-17 23:51:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:19,470 INFO L225 Difference]: With dead ends: 1354 [2021-12-17 23:51:19,470 INFO L226 Difference]: Without dead ends: 1266 [2021-12-17 23:51:19,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=498, Invalid=5052, Unknown=0, NotChecked=0, Total=5550 [2021-12-17 23:51:19,471 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 446 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:19,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1935 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2976 Invalid, 0 Unknown, 1241 Unchecked, 1.8s Time] [2021-12-17 23:51:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-12-17 23:51:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1233. [2021-12-17 23:51:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 913 states have (on average 1.0394304490690034) internal successors, (949), 928 states have internal predecessors, (949), 193 states have call successors, (193), 113 states have call predecessors, (193), 126 states have return successors, (243), 191 states have call predecessors, (243), 192 states have call successors, (243) [2021-12-17 23:51:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1385 transitions. [2021-12-17 23:51:19,569 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1385 transitions. Word has length 194 [2021-12-17 23:51:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:19,569 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1385 transitions. [2021-12-17 23:51:19,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.447368421052632) internal successors, (169), 35 states have internal predecessors, (169), 15 states have call successors, (43), 8 states have call predecessors, (43), 10 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-12-17 23:51:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1385 transitions. [2021-12-17 23:51:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 23:51:19,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:19,572 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:19,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:19,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 23:51:19,802 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:19,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1277090133, now seen corresponding path program 1 times [2021-12-17 23:51:19,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:19,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164244206] [2021-12-17 23:51:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:19,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:51:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:51:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:51:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 23:51:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 23:51:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-17 23:51:20,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164244206] [2021-12-17 23:51:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164244206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494254983] [2021-12-17 23:51:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:20,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:20,243 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:20,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 23:51:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 23:51:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:51:21,216 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:51:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-12-17 23:51:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 79 proven. 75 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 23:51:22,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:51:22,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494254983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:22,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:51:22,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 33 [2021-12-17 23:51:22,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135036767] [2021-12-17 23:51:22,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:51:22,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 23:51:22,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 23:51:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 23:51:22,771 INFO L87 Difference]: Start difference. First operand 1233 states and 1385 transitions. Second operand has 33 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 13 states have call successors, (44), 6 states have call predecessors, (44), 8 states have return successors, (43), 11 states have call predecessors, (43), 12 states have call successors, (43) [2021-12-17 23:51:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:26,942 INFO L93 Difference]: Finished difference Result 1431 states and 1659 transitions. [2021-12-17 23:51:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:51:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 13 states have call successors, (44), 6 states have call predecessors, (44), 8 states have return successors, (43), 11 states have call predecessors, (43), 12 states have call successors, (43) Word has length 194 [2021-12-17 23:51:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:26,946 INFO L225 Difference]: With dead ends: 1431 [2021-12-17 23:51:26,946 INFO L226 Difference]: Without dead ends: 1340 [2021-12-17 23:51:26,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 246 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=615, Invalid=4497, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 23:51:26,948 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 510 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 4756 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 6625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 4756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1371 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:26,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1667 Invalid, 6625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 4756 Invalid, 0 Unknown, 1371 Unchecked, 2.9s Time] [2021-12-17 23:51:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-17 23:51:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1264. [2021-12-17 23:51:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 932 states have (on average 1.03862660944206) internal successors, (968), 945 states have internal predecessors, (968), 203 states have call successors, (203), 115 states have call predecessors, (203), 128 states have return successors, (256), 203 states have call predecessors, (256), 202 states have call successors, (256) [2021-12-17 23:51:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1427 transitions. [2021-12-17 23:51:27,014 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1427 transitions. Word has length 194 [2021-12-17 23:51:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:27,014 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1427 transitions. [2021-12-17 23:51:27,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 13 states have call successors, (44), 6 states have call predecessors, (44), 8 states have return successors, (43), 11 states have call predecessors, (43), 12 states have call successors, (43) [2021-12-17 23:51:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1427 transitions. [2021-12-17 23:51:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 23:51:27,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:27,016 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:27,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-17 23:51:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:27,217 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1263488207, now seen corresponding path program 1 times [2021-12-17 23:51:27,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038224775] [2021-12-17 23:51:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:27,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:51:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:51:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:27,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:51:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 23:51:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 23:51:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 40 proven. 39 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-17 23:51:28,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038224775] [2021-12-17 23:51:28,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038224775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167472198] [2021-12-17 23:51:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:28,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:28,215 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:28,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 23:51:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 23:51:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:28,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:35,555 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:51:35,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-12-17 23:51:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-12-17 23:51:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 89 proven. 73 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 23:51:37,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:51:37,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167472198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:37,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:51:37,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 44 [2021-12-17 23:51:37,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280919690] [2021-12-17 23:51:37,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:51:37,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 23:51:37,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:37,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 23:51:37,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2438, Unknown=1, NotChecked=0, Total=2652 [2021-12-17 23:51:37,961 INFO L87 Difference]: Start difference. First operand 1264 states and 1427 transitions. Second operand has 44 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 41 states have internal predecessors, (156), 18 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-17 23:51:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:44,381 INFO L93 Difference]: Finished difference Result 1451 states and 1635 transitions. [2021-12-17 23:51:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 23:51:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 41 states have internal predecessors, (156), 18 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) Word has length 194 [2021-12-17 23:51:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:44,384 INFO L225 Difference]: With dead ends: 1451 [2021-12-17 23:51:44,384 INFO L226 Difference]: Without dead ends: 1336 [2021-12-17 23:51:44,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 236 SyntacticMatches, 18 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=652, Invalid=6318, Unknown=2, NotChecked=0, Total=6972 [2021-12-17 23:51:44,387 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 661 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 3878 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 4921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 3878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:44,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 1196 Invalid, 4921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 3878 Invalid, 0 Unknown, 679 Unchecked, 2.7s Time] [2021-12-17 23:51:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-12-17 23:51:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1291. [2021-12-17 23:51:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 960 states have (on average 1.0385416666666667) internal successors, (997), 972 states have internal predecessors, (997), 201 states have call successors, (201), 117 states have call predecessors, (201), 129 states have return successors, (252), 201 states have call predecessors, (252), 200 states have call successors, (252) [2021-12-17 23:51:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1450 transitions. [2021-12-17 23:51:44,456 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1450 transitions. Word has length 194 [2021-12-17 23:51:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 1450 transitions. [2021-12-17 23:51:44,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 41 states have internal predecessors, (156), 18 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (37), 15 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-17 23:51:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1450 transitions. [2021-12-17 23:51:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 23:51:44,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:44,458 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-12-17 23:51:44,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-17 23:51:44,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:44,667 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1606933027, now seen corresponding path program 1 times [2021-12-17 23:51:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935866193] [2021-12-17 23:51:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:44,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:51:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:51:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:51:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:51:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:51:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 23:51:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-17 23:51:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 23:51:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-17 23:51:44,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935866193] [2021-12-17 23:51:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935866193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:44,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:44,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 23:51:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820191746] [2021-12-17 23:51:44,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:44,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:51:44,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:51:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:51:44,913 INFO L87 Difference]: Start difference. First operand 1291 states and 1450 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 23:51:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:45,697 INFO L93 Difference]: Finished difference Result 1301 states and 1461 transitions. [2021-12-17 23:51:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 23:51:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 191 [2021-12-17 23:51:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:45,700 INFO L225 Difference]: With dead ends: 1301 [2021-12-17 23:51:45,700 INFO L226 Difference]: Without dead ends: 1299 [2021-12-17 23:51:45,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-17 23:51:45,701 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 207 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:45,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 991 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 23:51:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-12-17 23:51:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2021-12-17 23:51:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 963 states have (on average 1.0384215991692627) internal successors, (1000), 975 states have internal predecessors, (1000), 203 states have call successors, (203), 118 states have call predecessors, (203), 130 states have return successors, (254), 203 states have call predecessors, (254), 202 states have call successors, (254) [2021-12-17 23:51:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1457 transitions. [2021-12-17 23:51:45,791 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1457 transitions. Word has length 191 [2021-12-17 23:51:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:45,791 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1457 transitions. [2021-12-17 23:51:45,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 23:51:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1457 transitions. [2021-12-17 23:51:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-17 23:51:45,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:45,794 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:45,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 23:51:45,795 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2053769999, now seen corresponding path program 1 times [2021-12-17 23:51:45,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513020586] [2021-12-17 23:51:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:45,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:51:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:51:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:51:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 23:51:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:51:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:51:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 23:51:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:51:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:51:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:51:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-12-17 23:51:45,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513020586] [2021-12-17 23:51:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513020586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:51:46,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:51:46,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:51:46,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207966250] [2021-12-17 23:51:46,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:51:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:51:46,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:51:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:51:46,001 INFO L87 Difference]: Start difference. First operand 1297 states and 1457 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-17 23:51:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:51:46,534 INFO L93 Difference]: Finished difference Result 1399 states and 1568 transitions. [2021-12-17 23:51:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 23:51:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) Word has length 200 [2021-12-17 23:51:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:51:46,537 INFO L225 Difference]: With dead ends: 1399 [2021-12-17 23:51:46,537 INFO L226 Difference]: Without dead ends: 1293 [2021-12-17 23:51:46,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:51:46,538 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 268 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:51:46,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 620 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 23:51:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-12-17 23:51:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1293. [2021-12-17 23:51:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 961 states have (on average 1.036420395421436) internal successors, (996), 973 states have internal predecessors, (996), 201 states have call successors, (201), 118 states have call predecessors, (201), 130 states have return successors, (252), 201 states have call predecessors, (252), 200 states have call successors, (252) [2021-12-17 23:51:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1449 transitions. [2021-12-17 23:51:46,630 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1449 transitions. Word has length 200 [2021-12-17 23:51:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:51:46,630 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1449 transitions. [2021-12-17 23:51:46,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-17 23:51:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1449 transitions. [2021-12-17 23:51:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-17 23:51:46,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:51:46,634 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:51:46,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 23:51:46,634 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:51:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:51:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash -225785032, now seen corresponding path program 1 times [2021-12-17 23:51:46,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:51:46,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728746541] [2021-12-17 23:51:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:46,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:51:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:51:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:51:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:51:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:51:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:51:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:51:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:51:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:51:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:51:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:51:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:51:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:51:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:51:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:51:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:51:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 23:51:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 23:51:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 23:51:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:51:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 23:51:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 23:51:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 50 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 23:51:47,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:51:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728746541] [2021-12-17 23:51:47,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728746541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970324716] [2021-12-17 23:51:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:51:47,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:51:47,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:51:47,632 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:51:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 23:51:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:51:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2866 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 23:51:48,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:51:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:51:56,796 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 23:51:56,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2021-12-17 23:51:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-17 23:51:58,481 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-17 23:51:58,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-12-17 23:51:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 97 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 23:51:58,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:51:59,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970324716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:51:59,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:51:59,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 60 [2021-12-17 23:51:59,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363752642] [2021-12-17 23:51:59,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:51:59,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-17 23:51:59,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:51:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-17 23:51:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4871, Unknown=1, NotChecked=0, Total=5112 [2021-12-17 23:51:59,789 INFO L87 Difference]: Start difference. First operand 1293 states and 1449 transitions. Second operand has 60 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 51 states have internal predecessors, (180), 19 states have call successors, (45), 7 states have call predecessors, (45), 13 states have return successors, (44), 20 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-17 23:52:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:52:08,068 INFO L93 Difference]: Finished difference Result 1325 states and 1494 transitions. [2021-12-17 23:52:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-17 23:52:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 51 states have internal predecessors, (180), 19 states have call successors, (45), 7 states have call predecessors, (45), 13 states have return successors, (44), 20 states have call predecessors, (44), 18 states have call successors, (44) Word has length 196 [2021-12-17 23:52:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:52:08,072 INFO L225 Difference]: With dead ends: 1325 [2021-12-17 23:52:08,072 INFO L226 Difference]: Without dead ends: 1323 [2021-12-17 23:52:08,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 230 SyntacticMatches, 12 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4749 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1135, Invalid=16419, Unknown=2, NotChecked=0, Total=17556 [2021-12-17 23:52:08,073 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 536 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 6963 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 3106 SdHoareTripleChecker+Invalid, 10536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 6963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3095 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:52:08,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 3106 Invalid, 10536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 6963 Invalid, 0 Unknown, 3095 Unchecked, 3.3s Time] [2021-12-17 23:52:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-12-17 23:52:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1292. [2021-12-17 23:52:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 961 states have (on average 1.036420395421436) internal successors, (996), 973 states have internal predecessors, (996), 200 states have call successors, (200), 118 states have call predecessors, (200), 130 states have return successors, (251), 200 states have call predecessors, (251), 199 states have call successors, (251) [2021-12-17 23:52:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1447 transitions. [2021-12-17 23:52:08,146 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1447 transitions. Word has length 196 [2021-12-17 23:52:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:52:08,146 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 1447 transitions. [2021-12-17 23:52:08,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 51 states have internal predecessors, (180), 19 states have call successors, (45), 7 states have call predecessors, (45), 13 states have return successors, (44), 20 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-17 23:52:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1447 transitions. [2021-12-17 23:52:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-17 23:52:08,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:52:08,148 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:52:08,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 23:52:08,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-17 23:52:08,349 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:52:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:52:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1223245232, now seen corresponding path program 1 times [2021-12-17 23:52:08,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:52:08,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132957196] [2021-12-17 23:52:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:52:08,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:52:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:52:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:52:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:52:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:52:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:52:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:52:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:52:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:52:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:52:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:52:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:52:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 23:52:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:52:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:52:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:52:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:52:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 23:52:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:52:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 23:52:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:52:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-17 23:52:08,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:52:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132957196] [2021-12-17 23:52:08,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132957196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:52:08,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561571128] [2021-12-17 23:52:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:52:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:52:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:52:08,704 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:52:08,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 23:52:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:09,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 23:52:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:52:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-17 23:52:09,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:52:10,339 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-17 23:52:10,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-12-17 23:52:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-17 23:52:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561571128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:52:10,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:52:10,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 26 [2021-12-17 23:52:10,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042360707] [2021-12-17 23:52:10,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:52:10,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 23:52:10,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:52:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 23:52:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-12-17 23:52:10,437 INFO L87 Difference]: Start difference. First operand 1292 states and 1447 transitions. Second operand has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 21 states have internal predecessors, (139), 10 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (49), 10 states have call predecessors, (49), 10 states have call successors, (49) [2021-12-17 23:52:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:52:12,350 INFO L93 Difference]: Finished difference Result 1456 states and 1638 transitions. [2021-12-17 23:52:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 23:52:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 21 states have internal predecessors, (139), 10 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (49), 10 states have call predecessors, (49), 10 states have call successors, (49) Word has length 202 [2021-12-17 23:52:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:52:12,354 INFO L225 Difference]: With dead ends: 1456 [2021-12-17 23:52:12,354 INFO L226 Difference]: Without dead ends: 1317 [2021-12-17 23:52:12,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 427 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 23:52:12,355 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 411 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:52:12,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 775 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2166 Invalid, 0 Unknown, 466 Unchecked, 1.4s Time] [2021-12-17 23:52:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-12-17 23:52:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1284. [2021-12-17 23:52:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 953 states have (on average 1.0346274921301155) internal successors, (986), 964 states have internal predecessors, (986), 202 states have call successors, (202), 117 states have call predecessors, (202), 128 states have return successors, (250), 202 states have call predecessors, (250), 201 states have call successors, (250) [2021-12-17 23:52:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1438 transitions. [2021-12-17 23:52:12,471 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1438 transitions. Word has length 202 [2021-12-17 23:52:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:52:12,472 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1438 transitions. [2021-12-17 23:52:12,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 21 states have internal predecessors, (139), 10 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (49), 10 states have call predecessors, (49), 10 states have call successors, (49) [2021-12-17 23:52:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1438 transitions. [2021-12-17 23:52:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-17 23:52:12,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:52:12,475 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:52:12,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-17 23:52:12,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:52:12,687 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:52:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:52:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash 571516417, now seen corresponding path program 1 times [2021-12-17 23:52:12,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:52:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462175223] [2021-12-17 23:52:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:52:12,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:52:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:52:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:52:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:52:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:52:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:52:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:52:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:52:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:52:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:12,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:52:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:52:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:52:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:52:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 23:52:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:52:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 23:52:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 23:52:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-17 23:52:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:52:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:52:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 23:52:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-17 23:52:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-17 23:52:13,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:52:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462175223] [2021-12-17 23:52:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462175223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:52:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024532481] [2021-12-17 23:52:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:52:13,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:52:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:52:13,248 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:52:13,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 23:52:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:52:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 23:52:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:52:13,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:52:14,084 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 23:52:14,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-17 23:52:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:52:14,554 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-17 23:52:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-12-17 23:52:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-17 23:52:38,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 23:52:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 46 proven. 180 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 23:52:41,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:52:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024532481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:52:41,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:52:41,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 31] total 49 [2021-12-17 23:52:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602068894] [2021-12-17 23:52:41,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:52:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 23:52:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:52:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 23:52:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3441, Unknown=1, NotChecked=0, Total=3660 [2021-12-17 23:52:41,743 INFO L87 Difference]: Start difference. First operand 1284 states and 1438 transitions. Second operand has 49 states, 44 states have (on average 4.636363636363637) internal successors, (204), 43 states have internal predecessors, (204), 20 states have call successors, (50), 11 states have call predecessors, (50), 12 states have return successors, (47), 17 states have call predecessors, (47), 20 states have call successors, (47) [2021-12-17 23:53:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:53:06,431 INFO L93 Difference]: Finished difference Result 1750 states and 2027 transitions. [2021-12-17 23:53:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 23:53:06,431 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 4.636363636363637) internal successors, (204), 43 states have internal predecessors, (204), 20 states have call successors, (50), 11 states have call predecessors, (50), 12 states have return successors, (47), 17 states have call predecessors, (47), 20 states have call successors, (47) Word has length 204 [2021-12-17 23:53:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:53:06,434 INFO L225 Difference]: With dead ends: 1750 [2021-12-17 23:53:06,434 INFO L226 Difference]: Without dead ends: 1559 [2021-12-17 23:53:06,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 218 SyntacticMatches, 30 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3664 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=749, Invalid=11452, Unknown=9, NotChecked=0, Total=12210 [2021-12-17 23:53:06,436 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 370 mSDsluCounter, 3584 mSDsCounter, 0 mSdLazyCounter, 4561 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 3871 SdHoareTripleChecker+Invalid, 8618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 4561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3650 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:53:06,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 3871 Invalid, 8618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 4561 Invalid, 0 Unknown, 3650 Unchecked, 2.5s Time] [2021-12-17 23:53:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-12-17 23:53:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1447. [2021-12-17 23:53:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1071 states have (on average 1.0317460317460319) internal successors, (1105), 1082 states have internal predecessors, (1105), 232 states have call successors, (232), 135 states have call predecessors, (232), 143 states have return successors, (273), 229 states have call predecessors, (273), 231 states have call successors, (273) [2021-12-17 23:53:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 1610 transitions. [2021-12-17 23:53:06,518 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 1610 transitions. Word has length 204 [2021-12-17 23:53:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:53:06,518 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 1610 transitions. [2021-12-17 23:53:06,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 4.636363636363637) internal successors, (204), 43 states have internal predecessors, (204), 20 states have call successors, (50), 11 states have call predecessors, (50), 12 states have return successors, (47), 17 states have call predecessors, (47), 20 states have call successors, (47) [2021-12-17 23:53:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 1610 transitions. [2021-12-17 23:53:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-17 23:53:06,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:53:06,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:53:06,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-17 23:53:06,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:53:06,722 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:53:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:53:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1121661535, now seen corresponding path program 1 times [2021-12-17 23:53:06,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:53:06,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978338639] [2021-12-17 23:53:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:53:06,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:53:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:53:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:53:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:53:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:53:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:53:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:53:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:53:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:53:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:53:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:53:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:53:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:53:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:53:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 23:53:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:53:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 23:53:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 23:53:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:53:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 23:53:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 23:53:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 23:53:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 23:53:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:53:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-17 23:53:08,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:53:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978338639] [2021-12-17 23:53:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978338639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:53:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018805778] [2021-12-17 23:53:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:53:08,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:53:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:53:08,142 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:53:08,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 23:53:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:53:08,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2940 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-17 23:53:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:53:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:53:09,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 23:53:10,144 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_186| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_186|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_14| 8)) .cse0) (not (= .cse0 0))))) is different from true [2021-12-17 23:53:11,179 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_187| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_187|) 8))) (and (not (= .cse0 0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_15|) (+ |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_15| 8)) .cse0)))) is different from true [2021-12-17 23:53:12,168 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_188| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_16| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to~0#1.base_BEFORE_CALL_188|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.base_BEFORE_CALL_16|) (+ |v_ULTIMATE.start_aws_byte_buf_append_harness_~#to_old~0#1.offset_BEFORE_CALL_16| 8)) .cse0) (not (= .cse0 0))))) is different from true [2021-12-17 23:53:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:53:14,260 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-12-17 23:53:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-12-17 23:53:46,600 INFO L354 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2021-12-17 23:53:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 30 [2021-12-17 23:53:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 45 proven. 79 refuted. 16 times theorem prover too weak. 58 trivial. 20 not checked. [2021-12-17 23:53:46,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:53:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018805778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:53:47,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:53:47,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 53 [2021-12-17 23:53:47,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778395664] [2021-12-17 23:53:47,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:53:47,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 23:53:47,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:53:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 23:53:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2652, Unknown=26, NotChecked=318, Total=3192 [2021-12-17 23:53:47,091 INFO L87 Difference]: Start difference. First operand 1447 states and 1610 transitions. Second operand has 53 states, 49 states have (on average 3.204081632653061) internal successors, (157), 44 states have internal predecessors, (157), 20 states have call successors, (44), 12 states have call predecessors, (44), 13 states have return successors, (40), 20 states have call predecessors, (40), 17 states have call successors, (40) [2021-12-17 23:54:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:54:46,093 INFO L93 Difference]: Finished difference Result 1538 states and 1722 transitions. [2021-12-17 23:54:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 23:54:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 3.204081632653061) internal successors, (157), 44 states have internal predecessors, (157), 20 states have call successors, (44), 12 states have call predecessors, (44), 13 states have return successors, (40), 20 states have call predecessors, (40), 17 states have call successors, (40) Word has length 208 [2021-12-17 23:54:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:54:46,097 INFO L225 Difference]: With dead ends: 1538 [2021-12-17 23:54:46,097 INFO L226 Difference]: Without dead ends: 1536 [2021-12-17 23:54:46,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 233 SyntacticMatches, 19 SemanticMatches, 97 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=692, Invalid=8381, Unknown=59, NotChecked=570, Total=9702 [2021-12-17 23:54:46,099 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 421 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 3104 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 5409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 3104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1814 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:54:46,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1828 Invalid, 5409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 3104 Invalid, 0 Unknown, 1814 Unchecked, 1.7s Time] [2021-12-17 23:54:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-17 23:54:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1492. [2021-12-17 23:54:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1105 states have (on average 1.0316742081447965) internal successors, (1140), 1118 states have internal predecessors, (1140), 237 states have call successors, (237), 140 states have call predecessors, (237), 149 states have return successors, (278), 233 states have call predecessors, (278), 236 states have call successors, (278) [2021-12-17 23:54:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1655 transitions. [2021-12-17 23:54:46,188 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 1655 transitions. Word has length 208 [2021-12-17 23:54:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:54:46,188 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 1655 transitions. [2021-12-17 23:54:46,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 3.204081632653061) internal successors, (157), 44 states have internal predecessors, (157), 20 states have call successors, (44), 12 states have call predecessors, (44), 13 states have return successors, (40), 20 states have call predecessors, (40), 17 states have call successors, (40) [2021-12-17 23:54:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 1655 transitions. [2021-12-17 23:54:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-17 23:54:46,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:54:46,191 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:54:46,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 23:54:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:54:46,392 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:54:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:54:46,392 INFO L85 PathProgramCache]: Analyzing trace with hash 138534704, now seen corresponding path program 1 times [2021-12-17 23:54:46,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:54:46,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893309485] [2021-12-17 23:54:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:54:46,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:54:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:54:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:54:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:54:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:54:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:54:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 23:54:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 23:54:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:54:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:54:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 23:54:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:54:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:54:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 23:54:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:54:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:54:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:54:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:54:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-17 23:54:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-17 23:54:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-17 23:54:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:54:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:54:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:54:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 23:54:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-17 23:54:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 21 proven. 62 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-17 23:54:48,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:54:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893309485] [2021-12-17 23:54:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893309485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:54:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16572546] [2021-12-17 23:54:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:54:48,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:54:48,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:54:48,371 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:54:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 23:54:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:54:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-17 23:54:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:54:48,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:54:49,266 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 23:54:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 23:54:49,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:54:49,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:54:49,928 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:54:49,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 23:55:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-17 23:55:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-17 23:57:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:57:33,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-12-17 23:57:35,367 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3528 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memcpy_impl_#in~dst.base| v_ArrVal_3528))) is different from true [2021-12-17 23:57:35,380 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3528 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memcpy_#in~dst.base| v_ArrVal_3528))) is different from true [2021-12-17 23:57:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-17 23:57:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-17 23:57:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 35 proven. 188 refuted. 4 times theorem prover too weak. 69 trivial. 1 not checked. [2021-12-17 23:57:46,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:57:51,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3536 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_append_#t~mem873.base| v_ArrVal_3536) c_aws_byte_buf_append_~to.base) (+ c_aws_byte_buf_append_~to.offset 16)) 18446744073709551616))) is different from false [2021-12-17 23:57:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16572546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:51,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:57:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 66 [2021-12-17 23:57:51,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272156197] [2021-12-17 23:57:51,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:57:51,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 23:57:51,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 23:57:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=5199, Unknown=15, NotChecked=444, Total=6006 [2021-12-17 23:57:51,026 INFO L87 Difference]: Start difference. First operand 1492 states and 1655 transitions. Second operand has 66 states, 61 states have (on average 3.721311475409836) internal successors, (227), 54 states have internal predecessors, (227), 25 states have call successors, (50), 13 states have call predecessors, (50), 16 states have return successors, (47), 23 states have call predecessors, (47), 24 states have call successors, (47) [2021-12-17 23:58:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:40,280 INFO L93 Difference]: Finished difference Result 1668 states and 1840 transitions. [2021-12-17 23:58:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-17 23:58:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 61 states have (on average 3.721311475409836) internal successors, (227), 54 states have internal predecessors, (227), 25 states have call successors, (50), 13 states have call predecessors, (50), 16 states have return successors, (47), 23 states have call predecessors, (47), 24 states have call successors, (47) Word has length 211 [2021-12-17 23:58:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:40,284 INFO L225 Difference]: With dead ends: 1668 [2021-12-17 23:58:40,284 INFO L226 Difference]: Without dead ends: 1501 [2021-12-17 23:58:40,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 218 SyntacticMatches, 34 SemanticMatches, 124 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5485 ImplicationChecksByTransitivity, 228.6s TimeCoverageRelationStatistics Valid=899, Invalid=14063, Unknown=56, NotChecked=732, Total=15750 [2021-12-17 23:58:40,286 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 608 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 6040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2566 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:40,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 2255 Invalid, 6040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3024 Invalid, 0 Unknown, 2566 Unchecked, 1.8s Time] [2021-12-17 23:58:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-12-17 23:58:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1491. [2021-12-17 23:58:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1116 states have (on average 1.0295698924731183) internal successors, (1149), 1127 states have internal predecessors, (1149), 225 states have call successors, (225), 143 states have call predecessors, (225), 149 states have return successors, (252), 220 states have call predecessors, (252), 224 states have call successors, (252) [2021-12-17 23:58:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 1626 transitions. [2021-12-17 23:58:40,363 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 1626 transitions. Word has length 211 [2021-12-17 23:58:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:40,363 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 1626 transitions. [2021-12-17 23:58:40,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 61 states have (on average 3.721311475409836) internal successors, (227), 54 states have internal predecessors, (227), 25 states have call successors, (50), 13 states have call predecessors, (50), 16 states have return successors, (47), 23 states have call predecessors, (47), 24 states have call successors, (47) [2021-12-17 23:58:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 1626 transitions. [2021-12-17 23:58:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-17 23:58:40,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:40,366 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:40,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:40,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:40,566 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:40,567 INFO L85 PathProgramCache]: Analyzing trace with hash 577339945, now seen corresponding path program 1 times [2021-12-17 23:58:40,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:40,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622075644] [2021-12-17 23:58:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:40,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 23:58:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 23:58:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 23:58:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:58:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 23:58:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 23:58:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:58:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 23:58:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:58:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:58:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 23:58:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:58:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 23:58:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 23:58:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-17 23:58:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 23:58:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-17 23:58:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-17 23:58:43,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622075644] [2021-12-17 23:58:43,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622075644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513710073] [2021-12-17 23:58:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:43,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:43,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:43,351 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:43,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 23:58:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 206 conjunts are in the unsatisfiable core [2021-12-17 23:58:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:46,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:58:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-17 23:58:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:58:46,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-17 23:58:46,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:58:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:58:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:58:48,173 INFO L354 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2021-12-17 23:58:48,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 Killed by 15