./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_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 df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:55:23,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:55:23,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:55:23,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:55:23,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:55:23,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:55:23,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:55:23,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:55:23,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:55:23,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:55:23,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:55:23,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:55:23,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:55:23,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:55:23,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:55:23,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:55:23,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:55:23,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:55:23,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:55:23,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:55:23,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:55:23,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:55:23,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:55:23,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:55:23,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:55:23,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:55:23,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:55:23,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:55:23,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:55:23,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:55:23,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:55:23,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:55:23,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:55:23,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:55:23,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:55:23,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:55:23,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:55:23,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:55:23,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:55:23,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:55:23,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:55:23,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:55:23,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:55:23,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:55:23,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:55:23,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:55:23,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:55:23,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:55:23,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:55:23,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:55:23,985 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:55:23,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:55:23,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:55:23,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:55:23,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:55:23,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:55:23,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:55:23,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:55:23,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:55:23,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:55:23,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:55:23,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:55:23,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:55:23,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:55:23,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:55:23,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:55:23,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:55:23,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:55:23,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 [2021-11-16 20:55:24,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:55:24,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:55:24,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:55:24,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:55:24,233 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:55:24,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-11-16 20:55:24,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f2cccec/5de68570cf91429aa1913f5aaf5e42d8/FLAGb055f602f [2021-11-16 20:55:24,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:55:24,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-11-16 20:55:24,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f2cccec/5de68570cf91429aa1913f5aaf5e42d8/FLAGb055f602f [2021-11-16 20:55:25,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f2cccec/5de68570cf91429aa1913f5aaf5e42d8 [2021-11-16 20:55:25,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:55:25,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:55:25,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:55:25,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:55:25,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:55:25,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:55:25" (1/1) ... [2021-11-16 20:55:25,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5f5988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:25, skipping insertion in model container [2021-11-16 20:55:25,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:55:25" (1/1) ... [2021-11-16 20:55:25,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:55:25,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:55:25,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2021-11-16 20:55:25,262 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2021-11-16 20:55:25,278 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:55:25,284 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:55:25,834 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,837 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,838 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,840 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,851 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,858 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,859 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:25,865 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,035 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:55:26,036 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:55:26,037 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:55:26,038 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:55:26,038 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:55:26,039 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:55:26,039 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:55:26,039 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:55:26,040 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:55:26,040 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:55:26,113 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:55:26,198 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,199 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:55:26,309 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:55:26,327 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2021-11-16 20:55:26,328 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2021-11-16 20:55:26,329 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:55:26,332 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:55:26,358 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,359 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,360 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,361 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,361 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,365 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,365 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,366 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,396 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:55:26,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:55:26,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:55:26,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:55:26,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:55:26,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:55:26,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:55:26,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:55:26,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:55:26,401 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:55:26,411 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:55:26,439 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,439 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:55:26,479 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:55:26,643 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:55:26,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26 WrapperNode [2021-11-16 20:55:26,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:55:26,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:55:26,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:55:26,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:55:26,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,789 INFO L137 Inliner]: procedures = 692, calls = 2622, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 796 [2021-11-16 20:55:26,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:55:26,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:55:26,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:55:26,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:55:26,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:55:26,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:55:26,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:55:26,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:55:26,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (1/1) ... [2021-11-16 20:55:26,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:55:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:26,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 20:55:26,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 20:55:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-16 20:55:26,917 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-16 20:55:26,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:55:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:55:26,918 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:55:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:55:26,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:55:26,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:55:26,919 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-11-16 20:55:26,920 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-11-16 20:55:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:55:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:55:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:55:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:55:26,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:55:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:55:26,920 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:55:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:55:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:55:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:55:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:55:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:55:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:55:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:55:26,922 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-11-16 20:55:26,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-11-16 20:55:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:55:26,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:55:27,132 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:55:27,134 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:55:27,900 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:55:27,904 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:55:27,905 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-16 20:55:27,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:55:27 BoogieIcfgContainer [2021-11-16 20:55:27,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:55:27,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:55:27,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:55:27,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:55:27,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:55:25" (1/3) ... [2021-11-16 20:55:27,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5b9a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:55:27, skipping insertion in model container [2021-11-16 20:55:27,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:55:26" (2/3) ... [2021-11-16 20:55:27,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5b9a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:55:27, skipping insertion in model container [2021-11-16 20:55:27,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:55:27" (3/3) ... [2021-11-16 20:55:27,913 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_left_trim_pred_harness.i [2021-11-16 20:55:27,916 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:55:27,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:55:27,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:55:27,973 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 20:55:27,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:55:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-16 20:55:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-16 20:55:27,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:27,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:27,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 990555707, now seen corresponding path program 1 times [2021-11-16 20:55:28,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:28,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520447436] [2021-11-16 20:55:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:28,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 20:55:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:55:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:55:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:55:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:55:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:55:28,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:28,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520447436] [2021-11-16 20:55:28,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520447436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:28,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:28,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-16 20:55:28,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111472919] [2021-11-16 20:55:28,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:28,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 20:55:28,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 20:55:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:55:28,522 INFO L87 Difference]: Start difference. First operand has 95 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:28,561 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2021-11-16 20:55:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 20:55:28,563 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-16 20:55:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:28,571 INFO L225 Difference]: With dead ends: 186 [2021-11-16 20:55:28,571 INFO L226 Difference]: Without dead ends: 86 [2021-11-16 20:55:28,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 20:55:28,581 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:28,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-16 20:55:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-16 20:55:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-16 20:55:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-11-16 20:55:28,627 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 61 [2021-11-16 20:55:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:28,628 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-11-16 20:55:28,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-11-16 20:55:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-16 20:55:28,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:28,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:28,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:55:28,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -89389740, now seen corresponding path program 1 times [2021-11-16 20:55:28,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:28,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037586348] [2021-11-16 20:55:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:28,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-16 20:55:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:55:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:55:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:55:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:55:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:55:28,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:28,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037586348] [2021-11-16 20:55:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037586348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:28,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921332955] [2021-11-16 20:55:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:28,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:28,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:55:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:55:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:55:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-16 20:55:29,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:29,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921332955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:29,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:29,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-16 20:55:29,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582293242] [2021-11-16 20:55:29,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:55:29,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:55:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:55:29,537 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:29,665 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-11-16 20:55:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:55:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-11-16 20:55:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:29,669 INFO L225 Difference]: With dead ends: 155 [2021-11-16 20:55:29,669 INFO L226 Difference]: Without dead ends: 89 [2021-11-16 20:55:29,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:55:29,676 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 124 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:29,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:55:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-16 20:55:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-16 20:55:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-11-16 20:55:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-11-16 20:55:29,697 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 63 [2021-11-16 20:55:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:29,697 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-11-16 20:55:29,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-11-16 20:55:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-16 20:55:29,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:29,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:29,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:29,907 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 [2021-11-16 20:55:29,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1896344881, now seen corresponding path program 1 times [2021-11-16 20:55:29,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:29,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093048092] [2021-11-16 20:55:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:29,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:55:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-16 20:55:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 20:55:30,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:30,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093048092] [2021-11-16 20:55:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093048092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:30,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546945785] [2021-11-16 20:55:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:30,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:30,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:30,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:55:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:55:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:55:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-16 20:55:30,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:30,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546945785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:30,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:30,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-16 20:55:30,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350491408] [2021-11-16 20:55:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:55:30,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:55:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:55:30,594 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:30,754 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2021-11-16 20:55:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:55:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-16 20:55:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:30,756 INFO L225 Difference]: With dead ends: 148 [2021-11-16 20:55:30,756 INFO L226 Difference]: Without dead ends: 89 [2021-11-16 20:55:30,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-16 20:55:30,757 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:30,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 348 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:55:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-16 20:55:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-16 20:55:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-11-16 20:55:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-11-16 20:55:30,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 65 [2021-11-16 20:55:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:30,763 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-11-16 20:55:30,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-11-16 20:55:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-16 20:55:30,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:30,764 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:30,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:30,979 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 [2021-11-16 20:55:30,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1793788399, now seen corresponding path program 1 times [2021-11-16 20:55:30,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:30,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565062589] [2021-11-16 20:55:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:30,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:55:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:55:31,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:31,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565062589] [2021-11-16 20:55:31,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565062589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:31,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:31,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:55:31,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344721005] [2021-11-16 20:55:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:31,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:55:31,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:55:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:55:31,169 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:55:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:31,213 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2021-11-16 20:55:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:55:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-11-16 20:55:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:31,215 INFO L225 Difference]: With dead ends: 101 [2021-11-16 20:55:31,215 INFO L226 Difference]: Without dead ends: 99 [2021-11-16 20:55:31,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:55:31,216 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:31,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-16 20:55:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-16 20:55:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2021-11-16 20:55:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2021-11-16 20:55:31,222 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2021-11-16 20:55:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:31,223 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2021-11-16 20:55:31,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:55:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2021-11-16 20:55:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-16 20:55:31,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:31,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:31,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 20:55:31,224 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513463, now seen corresponding path program 1 times [2021-11-16 20:55:31,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:31,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508745728] [2021-11-16 20:55:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:31,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:55:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 20:55:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508745728] [2021-11-16 20:55:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508745728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118631273] [2021-11-16 20:55:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:31,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:31,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:55:31,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:55:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-16 20:55:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:32,041 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 19 treesize of output 1 [2021-11-16 20:55:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:55:32,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:55:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-16 20:55:33,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118631273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:55:33,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:55:33,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 25 [2021-11-16 20:55:33,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013421746] [2021-11-16 20:55:33,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:55:33,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 20:55:33,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 20:55:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-16 20:55:33,247 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:55:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:36,715 INFO L93 Difference]: Finished difference Result 249 states and 342 transitions. [2021-11-16 20:55:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 20:55:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 73 [2021-11-16 20:55:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:36,718 INFO L225 Difference]: With dead ends: 249 [2021-11-16 20:55:36,718 INFO L226 Difference]: Without dead ends: 168 [2021-11-16 20:55:36,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 20:55:36,719 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 122 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:36,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1090 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1024 Invalid, 0 Unknown, 230 Unchecked, 3.2s Time] [2021-11-16 20:55:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-16 20:55:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-11-16 20:55:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-11-16 20:55:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2021-11-16 20:55:36,736 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 73 [2021-11-16 20:55:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:36,737 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2021-11-16 20:55:36,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 23 states have internal predecessors, (89), 8 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-16 20:55:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2021-11-16 20:55:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 20:55:36,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:36,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:36,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:36,955 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 [2021-11-16 20:55:36,955 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash 295115559, now seen corresponding path program 1 times [2021-11-16 20:55:36,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:36,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078710767] [2021-11-16 20:55:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:36,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:55:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-16 20:55:37,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:37,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078710767] [2021-11-16 20:55:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078710767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:37,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:37,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 20:55:37,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969440205] [2021-11-16 20:55:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:37,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 20:55:37,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 20:55:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:55:37,108 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:37,120 INFO L93 Difference]: Finished difference Result 198 states and 258 transitions. [2021-11-16 20:55:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 20:55:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-11-16 20:55:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:37,124 INFO L225 Difference]: With dead ends: 198 [2021-11-16 20:55:37,124 INFO L226 Difference]: Without dead ends: 138 [2021-11-16 20:55:37,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:55:37,127 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:37,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-16 20:55:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-16 20:55:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.141304347826087) internal successors, (105), 94 states have internal predecessors, (105), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2021-11-16 20:55:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 177 transitions. [2021-11-16 20:55:37,143 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 177 transitions. Word has length 76 [2021-11-16 20:55:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:37,144 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 177 transitions. [2021-11-16 20:55:37,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 177 transitions. [2021-11-16 20:55:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:55:37,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:37,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:37,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 20:55:37,148 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1625051706, now seen corresponding path program 1 times [2021-11-16 20:55:37,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:37,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739862232] [2021-11-16 20:55:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:37,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:55:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:55:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:55:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 20:55:37,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:37,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739862232] [2021-11-16 20:55:37,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739862232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:37,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:37,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:55:37,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161051080] [2021-11-16 20:55:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:55:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:55:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:55:37,329 INFO L87 Difference]: Start difference. First operand 138 states and 177 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:55:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:37,351 INFO L93 Difference]: Finished difference Result 180 states and 229 transitions. [2021-11-16 20:55:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:55:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2021-11-16 20:55:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:37,353 INFO L225 Difference]: With dead ends: 180 [2021-11-16 20:55:37,353 INFO L226 Difference]: Without dead ends: 138 [2021-11-16 20:55:37,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:55:37,354 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 18 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:37,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 284 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-16 20:55:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-16 20:55:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.141304347826087) internal successors, (105), 94 states have internal predecessors, (105), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2021-11-16 20:55:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2021-11-16 20:55:37,366 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 81 [2021-11-16 20:55:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2021-11-16 20:55:37,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-16 20:55:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2021-11-16 20:55:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-16 20:55:37,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:37,369 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:55:37,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:55:37,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -442406659, now seen corresponding path program 1 times [2021-11-16 20:55:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:37,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516753176] [2021-11-16 20:55:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:37,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:55:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 20:55:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:55:37,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:37,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516753176] [2021-11-16 20:55:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516753176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:37,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572798993] [2021-11-16 20:55:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:37,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:37,687 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) [2021-11-16 20:55:37,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:55:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-16 20:55:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:38,073 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 19 treesize of output 1 [2021-11-16 20:55:38,633 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 20:55:38,633 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 55 treesize of output 31 [2021-11-16 20:55:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:55:38,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:55:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:55:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572798993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:55:38,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:55:38,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 20 [2021-11-16 20:55:38,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580955957] [2021-11-16 20:55:38,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:55:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:55:38,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:55:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:55:38,951 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-16 20:55:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:41,222 INFO L93 Difference]: Finished difference Result 238 states and 313 transitions. [2021-11-16 20:55:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-16 20:55:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-11-16 20:55:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:41,223 INFO L225 Difference]: With dead ends: 238 [2021-11-16 20:55:41,223 INFO L226 Difference]: Without dead ends: 171 [2021-11-16 20:55:41,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:55:41,224 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 86 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:41,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1254 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 746 Invalid, 0 Unknown, 165 Unchecked, 2.0s Time] [2021-11-16 20:55:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-16 20:55:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 148. [2021-11-16 20:55:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 99 states have (on average 1.101010101010101) internal successors, (109), 101 states have internal predecessors, (109), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (41), 32 states have call predecessors, (41), 32 states have call successors, (41) [2021-11-16 20:55:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2021-11-16 20:55:41,232 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 82 [2021-11-16 20:55:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:41,233 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2021-11-16 20:55:41,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 8 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-16 20:55:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2021-11-16 20:55:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 20:55:41,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:41,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-16 20:55:41,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-16 20:55:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:41,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -353744797, now seen corresponding path program 1 times [2021-11-16 20:55:41,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:41,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927928244] [2021-11-16 20:55:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:41,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:55:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:55:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:55:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:55:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:55:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:55:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:55:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 20:55:41,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:41,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927928244] [2021-11-16 20:55:41,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927928244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:41,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:41,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:55:41,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137818492] [2021-11-16 20:55:41,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:41,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:55:41,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:55:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:55:41,645 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:55:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:41,689 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-11-16 20:55:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:55:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2021-11-16 20:55:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:41,691 INFO L225 Difference]: With dead ends: 158 [2021-11-16 20:55:41,691 INFO L226 Difference]: Without dead ends: 156 [2021-11-16 20:55:41,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:55:41,693 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 16 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:41,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 736 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-16 20:55:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-11-16 20:55:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 104 states have internal predecessors, (112), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (43), 34 states have call predecessors, (43), 34 states have call successors, (43) [2021-11-16 20:55:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-11-16 20:55:41,704 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 87 [2021-11-16 20:55:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-11-16 20:55:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 20:55:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-11-16 20:55:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-16 20:55:41,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:41,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:41,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-16 20:55:41,706 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2069482329, now seen corresponding path program 1 times [2021-11-16 20:55:41,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:41,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113831567] [2021-11-16 20:55:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:41,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 20:55:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:55:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:55:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:55:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:55:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-16 20:55:41,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:41,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113831567] [2021-11-16 20:55:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113831567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:41,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024222220] [2021-11-16 20:55:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:41,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:41,893 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) [2021-11-16 20:55:41,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:55:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:55:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 20:55:42,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024222220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:42,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:42,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-16 20:55:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380796434] [2021-11-16 20:55:42,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:42,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:55:42,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:55:42,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:55:42,388 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:42,466 INFO L93 Difference]: Finished difference Result 260 states and 332 transitions. [2021-11-16 20:55:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:55:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-16 20:55:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:42,468 INFO L225 Difference]: With dead ends: 260 [2021-11-16 20:55:42,468 INFO L226 Difference]: Without dead ends: 159 [2021-11-16 20:55:42,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:55:42,469 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:42,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 799 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:55:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-16 20:55:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-16 20:55:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 109 states have internal predecessors, (116), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (49), 34 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-16 20:55:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2021-11-16 20:55:42,480 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 81 [2021-11-16 20:55:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:42,480 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2021-11-16 20:55:42,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2021-11-16 20:55:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-16 20:55:42,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:42,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:42,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 20:55:42,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1271029248, now seen corresponding path program 1 times [2021-11-16 20:55:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:42,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694818729] [2021-11-16 20:55:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:42,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:55:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 20:55:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:55:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:55:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-16 20:55:42,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:42,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694818729] [2021-11-16 20:55:42,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694818729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:42,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547984304] [2021-11-16 20:55:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:42,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:42,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:42,882 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) [2021-11-16 20:55:42,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:55:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:55:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 20:55:43,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:43,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547984304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:43,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:43,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-16 20:55:43,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890657852] [2021-11-16 20:55:43,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:43,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:55:43,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:55:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:55:43,367 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:43,443 INFO L93 Difference]: Finished difference Result 245 states and 312 transitions. [2021-11-16 20:55:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:55:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-11-16 20:55:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:43,444 INFO L225 Difference]: With dead ends: 245 [2021-11-16 20:55:43,444 INFO L226 Difference]: Without dead ends: 159 [2021-11-16 20:55:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:55:43,445 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:43,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 792 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:55:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-16 20:55:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-16 20:55:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 109 states have internal predecessors, (116), 36 states have call successors, (36), 15 states have call predecessors, (36), 16 states have return successors, (48), 34 states have call predecessors, (48), 34 states have call successors, (48) [2021-11-16 20:55:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2021-11-16 20:55:43,452 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 83 [2021-11-16 20:55:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2021-11-16 20:55:43,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 20:55:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2021-11-16 20:55:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 20:55:43,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:43,453 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-16 20:55:43,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:43,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:43,667 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash 558656115, now seen corresponding path program 2 times [2021-11-16 20:55:43,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:43,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321141297] [2021-11-16 20:55:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 20:55:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 20:55:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 20:55:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:55:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 20:55:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 20:55:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:55:44,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:44,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321141297] [2021-11-16 20:55:44,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321141297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:44,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990992514] [2021-11-16 20:55:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:55:44,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:44,009 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) [2021-11-16 20:55:44,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:55:46,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:55:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:55:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-16 20:55:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:46,473 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 19 treesize of output 1 [2021-11-16 20:55:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-16 20:55:47,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:55:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990992514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:47,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:55:47,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-11-16 20:55:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273839408] [2021-11-16 20:55:47,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:55:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 20:55:47,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 20:55:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:55:47,693 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-16 20:55:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:52,029 INFO L93 Difference]: Finished difference Result 271 states and 352 transitions. [2021-11-16 20:55:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-16 20:55:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2021-11-16 20:55:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:52,031 INFO L225 Difference]: With dead ends: 271 [2021-11-16 20:55:52,031 INFO L226 Difference]: Without dead ends: 206 [2021-11-16 20:55:52,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-11-16 20:55:52,032 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 133 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:52,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1368 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1035 Invalid, 0 Unknown, 321 Unchecked, 3.9s Time] [2021-11-16 20:55:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-16 20:55:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 173. [2021-11-16 20:55:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 119 states have internal predecessors, (126), 38 states have call successors, (38), 17 states have call predecessors, (38), 18 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2021-11-16 20:55:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 211 transitions. [2021-11-16 20:55:52,042 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 211 transitions. Word has length 87 [2021-11-16 20:55:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:52,042 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 211 transitions. [2021-11-16 20:55:52,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 22 states have internal predecessors, (89), 10 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (20), 10 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-16 20:55:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 211 transitions. [2021-11-16 20:55:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-16 20:55:52,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:52,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:52,258 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1900291175, now seen corresponding path program 2 times [2021-11-16 20:55:52,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:52,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230380526] [2021-11-16 20:55:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:52,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:55:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:55:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:55:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:55:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:55:52,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:52,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230380526] [2021-11-16 20:55:52,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230380526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:52,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996640445] [2021-11-16 20:55:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:55:52,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:52,622 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) [2021-11-16 20:55:52,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:55:52,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-16 20:55:52,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:55:52,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2312 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 20:55:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:55:53,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:53,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996640445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:53,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:53,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-11-16 20:55:53,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353385219] [2021-11-16 20:55:53,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:53,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:55:53,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:53,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:55:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:55:53,384 INFO L87 Difference]: Start difference. First operand 173 states and 211 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:53,827 INFO L93 Difference]: Finished difference Result 250 states and 307 transitions. [2021-11-16 20:55:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:55:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-11-16 20:55:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:53,833 INFO L225 Difference]: With dead ends: 250 [2021-11-16 20:55:53,833 INFO L226 Difference]: Without dead ends: 187 [2021-11-16 20:55:53,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:55:53,834 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 19 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:53,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 765 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2021-11-16 20:55:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-16 20:55:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-11-16 20:55:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 131 states have internal predecessors, (139), 39 states have call successors, (39), 17 states have call predecessors, (39), 19 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2021-11-16 20:55:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 227 transitions. [2021-11-16 20:55:53,842 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 227 transitions. Word has length 85 [2021-11-16 20:55:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:53,842 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 227 transitions. [2021-11-16 20:55:53,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-16 20:55:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 227 transitions. [2021-11-16 20:55:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 20:55:53,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:53,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:53,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 20:55:54,047 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1432579808, now seen corresponding path program 1 times [2021-11-16 20:55:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:54,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778530499] [2021-11-16 20:55:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:55:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:55:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:55:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:55:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-16 20:55:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:54,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778530499] [2021-11-16 20:55:54,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778530499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:54,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:54,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:55:54,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856983838] [2021-11-16 20:55:54,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:54,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:55:54,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:55:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:55:54,301 INFO L87 Difference]: Start difference. First operand 185 states and 227 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:55:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:54,672 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2021-11-16 20:55:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 20:55:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 87 [2021-11-16 20:55:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:54,674 INFO L225 Difference]: With dead ends: 193 [2021-11-16 20:55:54,674 INFO L226 Difference]: Without dead ends: 191 [2021-11-16 20:55:54,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:55:54,674 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 35 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:54,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1124 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:55:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-16 20:55:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-11-16 20:55:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 134 states have internal predecessors, (142), 40 states have call successors, (40), 18 states have call predecessors, (40), 20 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-11-16 20:55:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2021-11-16 20:55:54,682 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 87 [2021-11-16 20:55:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2021-11-16 20:55:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-16 20:55:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2021-11-16 20:55:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:55:54,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:54,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:55:54,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 20:55:54,685 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash 904354819, now seen corresponding path program 1 times [2021-11-16 20:55:54,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:54,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531264228] [2021-11-16 20:55:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:54,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:55:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:55:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:55:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:55:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:55:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-16 20:55:55,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:55,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531264228] [2021-11-16 20:55:55,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531264228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:55,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704615415] [2021-11-16 20:55:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:55,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:55,099 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) [2021-11-16 20:55:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:55:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-16 20:55:55,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:56,060 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 49 treesize of output 41 [2021-11-16 20:55:56,062 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 38 treesize of output 30 [2021-11-16 20:55:56,064 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 19 [2021-11-16 20:55:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 20:55:56,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:56,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704615415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:56,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:56,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-11-16 20:55:56,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269495761] [2021-11-16 20:55:56,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:56,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:55:56,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:55:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:55:56,172 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:55:57,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:55:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:58,340 INFO L93 Difference]: Finished difference Result 352 states and 461 transitions. [2021-11-16 20:55:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:55:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-11-16 20:55:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:58,342 INFO L225 Difference]: With dead ends: 352 [2021-11-16 20:55:58,342 INFO L226 Difference]: Without dead ends: 239 [2021-11-16 20:55:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:55:58,343 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 145 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:55:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 453 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 621 Invalid, 0 Unknown, 97 Unchecked, 1.8s Time] [2021-11-16 20:55:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-16 20:55:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-11-16 20:55:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 149 states have internal predecessors, (159), 41 states have call successors, (41), 19 states have call predecessors, (41), 22 states have return successors, (58), 39 states have call predecessors, (58), 39 states have call successors, (58) [2021-11-16 20:55:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2021-11-16 20:55:58,354 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 91 [2021-11-16 20:55:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:58,354 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2021-11-16 20:55:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-16 20:55:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2021-11-16 20:55:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-16 20:55:58,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:58,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-16 20:55:58,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:58,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-16 20:55:58,563 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -62995835, now seen corresponding path program 1 times [2021-11-16 20:55:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:58,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301807099] [2021-11-16 20:55:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:58,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:55:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 20:55:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 20:55:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:55:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:55:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:55:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-16 20:55:58,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:58,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301807099] [2021-11-16 20:55:58,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301807099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:55:58,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086812066] [2021-11-16 20:55:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:58,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:55:58,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:55:58,692 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) [2021-11-16 20:55:58,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:55:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:55:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:55:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-16 20:55:59,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:55:59,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086812066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:59,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:55:59,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 20:55:59,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108764689] [2021-11-16 20:55:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:59,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:55:59,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:55:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 20:55:59,129 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 20:55:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:55:59,148 INFO L93 Difference]: Finished difference Result 331 states and 421 transitions. [2021-11-16 20:55:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:55:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-16 20:55:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:55:59,153 INFO L225 Difference]: With dead ends: 331 [2021-11-16 20:55:59,153 INFO L226 Difference]: Without dead ends: 199 [2021-11-16 20:55:59,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:55:59,154 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 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 [2021-11-16 20:55:59,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:55:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-16 20:55:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-11-16 20:55:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 139 states have internal predecessors, (145), 40 states have call successors, (40), 19 states have call predecessors, (40), 21 states have return successors, (50), 37 states have call predecessors, (50), 38 states have call successors, (50) [2021-11-16 20:55:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 235 transitions. [2021-11-16 20:55:59,161 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 235 transitions. Word has length 91 [2021-11-16 20:55:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:55:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 235 transitions. [2021-11-16 20:55:59,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 20:55:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 235 transitions. [2021-11-16 20:55:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-16 20:55:59,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:55:59,163 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-11-16 20:55:59,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:55:59,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-16 20:55:59,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:55:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:55:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1386307521, now seen corresponding path program 1 times [2021-11-16 20:55:59,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:55:59,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070725589] [2021-11-16 20:55:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:55:59,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:55:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:55:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:55:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:55:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:55:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:55:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:55:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:55:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:55:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:55:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:55:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:55:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:55:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-16 20:55:59,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:55:59,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070725589] [2021-11-16 20:55:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070725589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:55:59,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:55:59,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:55:59,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063832259] [2021-11-16 20:55:59,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:55:59,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:55:59,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:55:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:55:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:55:59,593 INFO L87 Difference]: Start difference. First operand 196 states and 235 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:56:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:00,144 INFO L93 Difference]: Finished difference Result 204 states and 243 transitions. [2021-11-16 20:56:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:56:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-11-16 20:56:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:00,145 INFO L225 Difference]: With dead ends: 204 [2021-11-16 20:56:00,145 INFO L226 Difference]: Without dead ends: 202 [2021-11-16 20:56:00,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:56:00,146 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:00,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 526 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:56:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-16 20:56:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-16 20:56:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 142 states have internal predecessors, (148), 41 states have call successors, (41), 20 states have call predecessors, (41), 22 states have return successors, (51), 38 states have call predecessors, (51), 39 states have call successors, (51) [2021-11-16 20:56:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 240 transitions. [2021-11-16 20:56:00,161 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 240 transitions. Word has length 100 [2021-11-16 20:56:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 240 transitions. [2021-11-16 20:56:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:56:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 240 transitions. [2021-11-16 20:56:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-16 20:56:00,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:00,163 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:00,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 20:56:00,163 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1718798494, now seen corresponding path program 1 times [2021-11-16 20:56:00,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:00,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619319218] [2021-11-16 20:56:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:00,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:56:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 20:56:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:56:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:56:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:56:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:56:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:56:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 20:56:00,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:00,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619319218] [2021-11-16 20:56:00,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619319218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:00,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082211154] [2021-11-16 20:56:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:00,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:00,541 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) [2021-11-16 20:56:00,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:56:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-16 20:56:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:00,960 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 [2021-11-16 20:56:00,964 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 [2021-11-16 20:56:01,151 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 21 [2021-11-16 20:56:01,153 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 18 treesize of output 10 [2021-11-16 20:56:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:56:01,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:56:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082211154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:01,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:56:01,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-11-16 20:56:01,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494974380] [2021-11-16 20:56:01,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:01,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:56:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:56:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:56:01,254 INFO L87 Difference]: Start difference. First operand 201 states and 240 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:56:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:01,361 INFO L93 Difference]: Finished difference Result 380 states and 464 transitions. [2021-11-16 20:56:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 20:56:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 98 [2021-11-16 20:56:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:01,362 INFO L225 Difference]: With dead ends: 380 [2021-11-16 20:56:01,362 INFO L226 Difference]: Without dead ends: 230 [2021-11-16 20:56:01,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:56:01,363 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 55 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:01,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 440 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 87 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-16 20:56:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-16 20:56:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2021-11-16 20:56:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 148 states have (on average 1.0743243243243243) internal successors, (159), 154 states have internal predecessors, (159), 43 states have call successors, (43), 22 states have call predecessors, (43), 24 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-11-16 20:56:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 255 transitions. [2021-11-16 20:56:01,373 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 255 transitions. Word has length 98 [2021-11-16 20:56:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:01,374 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 255 transitions. [2021-11-16 20:56:01,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-16 20:56:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 255 transitions. [2021-11-16 20:56:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 20:56:01,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:01,375 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-16 20:56:01,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:01,587 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,SelfDestructingSolverStorable17 [2021-11-16 20:56:01,587 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2111461513, now seen corresponding path program 1 times [2021-11-16 20:56:01,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:01,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624730198] [2021-11-16 20:56:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:01,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:56:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:56:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:56:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:01,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-16 20:56:02,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:02,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624730198] [2021-11-16 20:56:02,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624730198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:02,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421062936] [2021-11-16 20:56:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:02,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:02,017 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) [2021-11-16 20:56:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 20:56:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2564 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-16 20:56:02,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:02,368 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 19 treesize of output 1 [2021-11-16 20:56:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-16 20:56:02,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:56:03,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421062936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:03,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:56:03,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-11-16 20:56:03,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436187751] [2021-11-16 20:56:03,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:56:03,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 20:56:03,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 20:56:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-16 20:56:03,072 INFO L87 Difference]: Start difference. First operand 216 states and 255 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 10 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-16 20:56:04,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:56:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:06,718 INFO L93 Difference]: Finished difference Result 358 states and 450 transitions. [2021-11-16 20:56:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 20:56:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 10 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 104 [2021-11-16 20:56:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:06,720 INFO L225 Difference]: With dead ends: 358 [2021-11-16 20:56:06,720 INFO L226 Difference]: Without dead ends: 266 [2021-11-16 20:56:06,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2021-11-16 20:56:06,722 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 272 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:06,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 458 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1440 Invalid, 0 Unknown, 395 Unchecked, 3.0s Time] [2021-11-16 20:56:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-16 20:56:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 230. [2021-11-16 20:56:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 154 states have (on average 1.0714285714285714) internal successors, (165), 159 states have internal predecessors, (165), 50 states have call successors, (50), 23 states have call predecessors, (50), 25 states have return successors, (66), 47 states have call predecessors, (66), 48 states have call successors, (66) [2021-11-16 20:56:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 281 transitions. [2021-11-16 20:56:06,732 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 281 transitions. Word has length 104 [2021-11-16 20:56:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 281 transitions. [2021-11-16 20:56:06,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 10 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-16 20:56:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 281 transitions. [2021-11-16 20:56:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-16 20:56:06,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:06,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:06,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:56:06,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:06,942 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1690843138, now seen corresponding path program 1 times [2021-11-16 20:56:06,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:06,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176427719] [2021-11-16 20:56:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:06,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:56:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:56:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:56:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:56:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:56:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:56:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:56:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:56:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-16 20:56:07,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:07,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176427719] [2021-11-16 20:56:07,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176427719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:07,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:07,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-16 20:56:07,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800516522] [2021-11-16 20:56:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 20:56:07,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 20:56:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:56:07,715 INFO L87 Difference]: Start difference. First operand 230 states and 281 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:56:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:10,038 INFO L93 Difference]: Finished difference Result 325 states and 412 transitions. [2021-11-16 20:56:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 20:56:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 109 [2021-11-16 20:56:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:10,042 INFO L225 Difference]: With dead ends: 325 [2021-11-16 20:56:10,042 INFO L226 Difference]: Without dead ends: 255 [2021-11-16 20:56:10,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-11-16 20:56:10,045 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 147 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:10,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 627 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-16 20:56:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-16 20:56:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 241. [2021-11-16 20:56:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 167 states have internal predecessors, (172), 52 states have call successors, (52), 23 states have call predecessors, (52), 27 states have return successors, (77), 50 states have call predecessors, (77), 50 states have call successors, (77) [2021-11-16 20:56:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 301 transitions. [2021-11-16 20:56:10,064 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 301 transitions. Word has length 109 [2021-11-16 20:56:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:10,066 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 301 transitions. [2021-11-16 20:56:10,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 16 states have internal predecessors, (56), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-16 20:56:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 301 transitions. [2021-11-16 20:56:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-16 20:56:10,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:10,067 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-16 20:56:10,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-16 20:56:10,067 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1949008576, now seen corresponding path program 1 times [2021-11-16 20:56:10,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:10,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015978691] [2021-11-16 20:56:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:10,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:56:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:56:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:56:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:56:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:56:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:56:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:56:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:56:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-16 20:56:10,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:10,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015978691] [2021-11-16 20:56:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015978691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:10,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:10,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 20:56:10,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669442481] [2021-11-16 20:56:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:10,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:56:10,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:56:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 20:56:10,257 INFO L87 Difference]: Start difference. First operand 241 states and 301 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-16 20:56:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:10,825 INFO L93 Difference]: Finished difference Result 319 states and 407 transitions. [2021-11-16 20:56:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:56:10,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-11-16 20:56:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:10,826 INFO L225 Difference]: With dead ends: 319 [2021-11-16 20:56:10,826 INFO L226 Difference]: Without dead ends: 233 [2021-11-16 20:56:10,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:56:10,827 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:10,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 20:56:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-16 20:56:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-16 20:56:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 155 states have (on average 1.064516129032258) internal successors, (165), 160 states have internal predecessors, (165), 51 states have call successors, (51), 23 states have call predecessors, (51), 26 states have return successors, (68), 49 states have call predecessors, (68), 49 states have call successors, (68) [2021-11-16 20:56:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 284 transitions. [2021-11-16 20:56:10,838 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 284 transitions. Word has length 109 [2021-11-16 20:56:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:10,838 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 284 transitions. [2021-11-16 20:56:10,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-16 20:56:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 284 transitions. [2021-11-16 20:56:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-16 20:56:10,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:10,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:10,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-16 20:56:10,840 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1466498319, now seen corresponding path program 1 times [2021-11-16 20:56:10,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:10,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144213071] [2021-11-16 20:56:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:10,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:56:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:56:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:56:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:56:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:56:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-16 20:56:10,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:10,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144213071] [2021-11-16 20:56:10,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144213071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:10,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:10,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:56:10,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146175239] [2021-11-16 20:56:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:10,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:56:10,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:56:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:56:10,992 INFO L87 Difference]: Start difference. First operand 233 states and 284 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 20:56:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:11,295 INFO L93 Difference]: Finished difference Result 246 states and 297 transitions. [2021-11-16 20:56:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:56:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 112 [2021-11-16 20:56:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:11,297 INFO L225 Difference]: With dead ends: 246 [2021-11-16 20:56:11,297 INFO L226 Difference]: Without dead ends: 230 [2021-11-16 20:56:11,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:56:11,297 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 50 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:11,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 230 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 20:56:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-16 20:56:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-16 20:56:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 153 states have (on average 1.0588235294117647) internal successors, (162), 157 states have internal predecessors, (162), 51 states have call successors, (51), 23 states have call predecessors, (51), 25 states have return successors, (67), 49 states have call predecessors, (67), 49 states have call successors, (67) [2021-11-16 20:56:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 280 transitions. [2021-11-16 20:56:11,309 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 280 transitions. Word has length 112 [2021-11-16 20:56:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 280 transitions. [2021-11-16 20:56:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 20:56:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 280 transitions. [2021-11-16 20:56:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-16 20:56:11,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:11,313 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:56:11,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-16 20:56:11,314 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 964794292, now seen corresponding path program 1 times [2021-11-16 20:56:11,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:11,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658415312] [2021-11-16 20:56:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:11,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:56:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:56:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:56:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:56:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:56:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:56:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:56:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:56:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:56:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-16 20:56:11,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:11,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658415312] [2021-11-16 20:56:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658415312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:56:11,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:56:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:56:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811928933] [2021-11-16 20:56:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:56:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:56:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:56:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:56:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:56:11,492 INFO L87 Difference]: Start difference. First operand 230 states and 280 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 20:56:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:56:11,809 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2021-11-16 20:56:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:56:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 114 [2021-11-16 20:56:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:56:11,811 INFO L225 Difference]: With dead ends: 238 [2021-11-16 20:56:11,811 INFO L226 Difference]: Without dead ends: 236 [2021-11-16 20:56:11,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:56:11,811 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 49 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:56:11,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 515 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:56:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-16 20:56:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-11-16 20:56:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 156 states have (on average 1.0576923076923077) internal successors, (165), 160 states have internal predecessors, (165), 52 states have call successors, (52), 24 states have call predecessors, (52), 26 states have return successors, (68), 50 states have call predecessors, (68), 50 states have call successors, (68) [2021-11-16 20:56:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2021-11-16 20:56:11,822 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 114 [2021-11-16 20:56:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:56:11,822 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2021-11-16 20:56:11,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 20:56:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2021-11-16 20:56:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-16 20:56:11,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:56:11,823 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-16 20:56:11,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-16 20:56:11,824 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:56:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:56:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1411369220, now seen corresponding path program 1 times [2021-11-16 20:56:11,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:56:11,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565206382] [2021-11-16 20:56:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:11,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:56:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:56:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:56:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:56:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:56:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:56:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:56:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:56:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:56:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:56:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:56:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:56:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:56:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-16 20:56:12,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:56:12,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565206382] [2021-11-16 20:56:12,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565206382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:56:12,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356738062] [2021-11-16 20:56:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:56:12,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:56:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:56:12,722 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) [2021-11-16 20:56:12,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 20:56:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:56:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-16 20:56:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:56:13,032 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 [2021-11-16 20:56:13,200 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:56:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-11-16 20:56:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-16 20:56:13,710 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-16 20:56:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-16 20:56:13,754 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 40 treesize of output 20 [2021-11-16 20:56:21,588 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-16 20:56:21,588 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 48 treesize of output 24 [2021-11-16 20:57:00,610 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-16 20:57:00,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 50 [2021-11-16 20:57:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:00,626 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 17 treesize of output 17 [2021-11-16 20:57:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:57:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-11-16 20:57:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-16 20:57:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:57:02,013 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 20:57:02,013 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 19 treesize of output 18 [2021-11-16 20:57:04,078 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_left_trim_pred_~#trimmed~1.base| Int) (v_DerPreprocessor_2 Int)) (or (and (= c_aws_byte_cursor_left_trim_pred_~source.base |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) (= c_aws_byte_cursor_left_trim_pred_~source.offset |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base| (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| v_DerPreprocessor_2)) (.cse1 (+ |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| 8))) (store .cse0 .cse1 (select .cse0 .cse1)))) c_aws_byte_cursor_left_trim_pred_~source.base) (+ c_aws_byte_cursor_left_trim_pred_~source.offset 8)) 0)))) is different from false [2021-11-16 20:57:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356738062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:04,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:57:04,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 42 [2021-11-16 20:57:04,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809550712] [2021-11-16 20:57:04,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:57:04,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-16 20:57:04,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-16 20:57:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2327, Unknown=4, NotChecked=98, Total=2652 [2021-11-16 20:57:04,119 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 36 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 20:57:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:12,192 INFO L93 Difference]: Finished difference Result 377 states and 461 transitions. [2021-11-16 20:57:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-16 20:57:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 36 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) Word has length 112 [2021-11-16 20:57:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:12,195 INFO L225 Difference]: With dead ends: 377 [2021-11-16 20:57:12,195 INFO L226 Difference]: Without dead ends: 310 [2021-11-16 20:57:12,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 123 SyntacticMatches, 19 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=558, Invalid=6580, Unknown=6, NotChecked=166, Total=7310 [2021-11-16 20:57:12,197 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 114 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:12,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 933 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 725 Invalid, 0 Unknown, 693 Unchecked, 1.9s Time] [2021-11-16 20:57:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-16 20:57:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 279. [2021-11-16 20:57:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 195 states have (on average 1.082051282051282) internal successors, (211), 200 states have internal predecessors, (211), 52 states have call successors, (52), 29 states have call predecessors, (52), 31 states have return successors, (68), 49 states have call predecessors, (68), 50 states have call successors, (68) [2021-11-16 20:57:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 331 transitions. [2021-11-16 20:57:12,213 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 331 transitions. Word has length 112 [2021-11-16 20:57:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:12,214 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 331 transitions. [2021-11-16 20:57:12,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 36 states have internal predecessors, (128), 16 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-16 20:57:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 331 transitions. [2021-11-16 20:57:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-16 20:57:12,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:12,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:12,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 20:57:12,431 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,SelfDestructingSolverStorable23 [2021-11-16 20:57:12,431 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash 415964924, now seen corresponding path program 1 times [2021-11-16 20:57:12,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:12,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274279842] [2021-11-16 20:57:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:12,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:57:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:57:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:57:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:57:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:57:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:57:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-16 20:57:12,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:12,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274279842] [2021-11-16 20:57:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274279842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:12,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972864529] [2021-11-16 20:57:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:12,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:57:12,831 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) [2021-11-16 20:57:12,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 20:57:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-16 20:57:14,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:57:14,292 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 19 treesize of output 1 [2021-11-16 20:57:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 20:57:15,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:57:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972864529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:17,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:57:17,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-11-16 20:57:17,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471000695] [2021-11-16 20:57:17,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:57:17,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 20:57:17,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 20:57:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1073, Unknown=1, NotChecked=0, Total=1190 [2021-11-16 20:57:17,198 INFO L87 Difference]: Start difference. First operand 279 states and 331 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 27 states have internal predecessors, (97), 12 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) [2021-11-16 20:57:19,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:21,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:23,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:25,623 INFO L93 Difference]: Finished difference Result 412 states and 494 transitions. [2021-11-16 20:57:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-16 20:57:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 27 states have internal predecessors, (97), 12 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) Word has length 118 [2021-11-16 20:57:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:25,625 INFO L225 Difference]: With dead ends: 412 [2021-11-16 20:57:25,625 INFO L226 Difference]: Without dead ends: 344 [2021-11-16 20:57:25,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=2788, Unknown=1, NotChecked=0, Total=3080 [2021-11-16 20:57:25,626 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 153 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:25,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 768 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1556 Invalid, 1 Unknown, 613 Unchecked, 7.7s Time] [2021-11-16 20:57:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-16 20:57:25,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 311. [2021-11-16 20:57:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 219 states have (on average 1.082191780821918) internal successors, (237), 224 states have internal predecessors, (237), 57 states have call successors, (57), 32 states have call predecessors, (57), 34 states have return successors, (74), 54 states have call predecessors, (74), 55 states have call successors, (74) [2021-11-16 20:57:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2021-11-16 20:57:25,640 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 118 [2021-11-16 20:57:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:25,640 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2021-11-16 20:57:25,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 27 states have internal predecessors, (97), 12 states have call successors, (31), 5 states have call predecessors, (31), 7 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) [2021-11-16 20:57:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2021-11-16 20:57:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 20:57:25,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:25,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:25,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 20:57:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:25,864 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1588558461, now seen corresponding path program 1 times [2021-11-16 20:57:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:25,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889860440] [2021-11-16 20:57:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:25,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:57:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:25,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:57:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:57:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:26,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:57:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:26,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:57:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:26,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:57:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-16 20:57:26,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:26,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889860440] [2021-11-16 20:57:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889860440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:26,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:57:26,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271633841] [2021-11-16 20:57:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:26,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:57:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:57:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:57:26,131 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 20:57:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:26,957 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2021-11-16 20:57:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:57:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 120 [2021-11-16 20:57:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:26,964 INFO L225 Difference]: With dead ends: 319 [2021-11-16 20:57:26,964 INFO L226 Difference]: Without dead ends: 317 [2021-11-16 20:57:26,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:57:26,965 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 67 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:26,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 768 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 20:57:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-16 20:57:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 311. [2021-11-16 20:57:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 219 states have (on average 1.082191780821918) internal successors, (237), 224 states have internal predecessors, (237), 57 states have call successors, (57), 32 states have call predecessors, (57), 34 states have return successors, (74), 54 states have call predecessors, (74), 55 states have call successors, (74) [2021-11-16 20:57:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 368 transitions. [2021-11-16 20:57:26,978 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 368 transitions. Word has length 120 [2021-11-16 20:57:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 368 transitions. [2021-11-16 20:57:26,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 20:57:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 368 transitions. [2021-11-16 20:57:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-16 20:57:26,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:26,980 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:26,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-16 20:57:26,980 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1324049691, now seen corresponding path program 1 times [2021-11-16 20:57:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:26,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077658446] [2021-11-16 20:57:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:26,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:57:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:57:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:57:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 20:57:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:57:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:57:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 20:57:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-16 20:57:27,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:27,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077658446] [2021-11-16 20:57:27,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077658446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:27,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:27,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:57:27,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137051297] [2021-11-16 20:57:27,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:27,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:57:27,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:57:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:57:27,342 INFO L87 Difference]: Start difference. First operand 311 states and 368 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 20:57:30,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:31,666 INFO L93 Difference]: Finished difference Result 342 states and 411 transitions. [2021-11-16 20:57:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-16 20:57:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 124 [2021-11-16 20:57:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:31,668 INFO L225 Difference]: With dead ends: 342 [2021-11-16 20:57:31,668 INFO L226 Difference]: Without dead ends: 231 [2021-11-16 20:57:31,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:57:31,669 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:31,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 434 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-16 20:57:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-16 20:57:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2021-11-16 20:57:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 154 states have internal predecessors, (165), 51 states have call successors, (51), 21 states have call predecessors, (51), 23 states have return successors, (66), 50 states have call predecessors, (66), 48 states have call successors, (66) [2021-11-16 20:57:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-16 20:57:31,679 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 124 [2021-11-16 20:57:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:31,680 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-16 20:57:31,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 20:57:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-16 20:57:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-16 20:57:31,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:31,681 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-16 20:57:31,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-16 20:57:31,681 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:31,682 INFO L85 PathProgramCache]: Analyzing trace with hash 73196301, now seen corresponding path program 1 times [2021-11-16 20:57:31,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:31,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056813272] [2021-11-16 20:57:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:31,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:57:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:57:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:57:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:57:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:57:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:57:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:57:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:57:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:57:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 20:57:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:57:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-16 20:57:32,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:32,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056813272] [2021-11-16 20:57:32,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056813272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:32,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:32,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-16 20:57:32,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310931692] [2021-11-16 20:57:32,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:57:32,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:57:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:57:32,391 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-16 20:57:34,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:37,200 INFO L93 Difference]: Finished difference Result 295 states and 364 transitions. [2021-11-16 20:57:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-16 20:57:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 129 [2021-11-16 20:57:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:37,202 INFO L225 Difference]: With dead ends: 295 [2021-11-16 20:57:37,202 INFO L226 Difference]: Without dead ends: 226 [2021-11-16 20:57:37,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-11-16 20:57:37,202 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 113 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:37,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 315 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-16 20:57:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-16 20:57:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2021-11-16 20:57:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 151 states have internal predecessors, (162), 49 states have call successors, (49), 21 states have call predecessors, (49), 22 states have return successors, (58), 47 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-16 20:57:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2021-11-16 20:57:37,217 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 129 [2021-11-16 20:57:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:37,218 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2021-11-16 20:57:37,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 17 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-16 20:57:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2021-11-16 20:57:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 20:57:37,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:37,219 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:37,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-16 20:57:37,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash 212748628, now seen corresponding path program 1 times [2021-11-16 20:57:37,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:37,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48814008] [2021-11-16 20:57:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:37,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:57:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:57:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:57:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:57:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:57:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:57:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 20:57:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:57:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:57:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 20:57:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 20:57:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-16 20:57:37,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:37,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48814008] [2021-11-16 20:57:37,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48814008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:37,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:37,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-16 20:57:37,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967583015] [2021-11-16 20:57:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-16 20:57:37,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-16 20:57:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:57:37,502 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 20:57:38,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:40,229 INFO L93 Difference]: Finished difference Result 226 states and 274 transitions. [2021-11-16 20:57:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:57:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-11-16 20:57:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:40,230 INFO L225 Difference]: With dead ends: 226 [2021-11-16 20:57:40,230 INFO L226 Difference]: Without dead ends: 224 [2021-11-16 20:57:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:57:40,231 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 63 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:40,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 861 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-16 20:57:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-16 20:57:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-16 20:57:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 151 states have (on average 1.0927152317880795) internal successors, (165), 154 states have internal predecessors, (165), 49 states have call successors, (49), 22 states have call predecessors, (49), 23 states have return successors, (58), 47 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-16 20:57:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 272 transitions. [2021-11-16 20:57:40,242 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 272 transitions. Word has length 131 [2021-11-16 20:57:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:40,242 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 272 transitions. [2021-11-16 20:57:40,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 20:57:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 272 transitions. [2021-11-16 20:57:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-16 20:57:40,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:40,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2021-11-16 20:57:40,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-16 20:57:40,244 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1763688684, now seen corresponding path program 1 times [2021-11-16 20:57:40,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:40,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718379759] [2021-11-16 20:57:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:40,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:57:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:57:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:57:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:57:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:57:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-16 20:57:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 20:57:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 20:57:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 20:57:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 20:57:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 20:57:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-16 20:57:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-16 20:57:40,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:40,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718379759] [2021-11-16 20:57:40,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718379759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:40,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:40,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-16 20:57:40,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073796993] [2021-11-16 20:57:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:40,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 20:57:40,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:40,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 20:57:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:57:40,551 INFO L87 Difference]: Start difference. First operand 224 states and 272 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-16 20:57:42,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:44,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:45,527 INFO L93 Difference]: Finished difference Result 265 states and 326 transitions. [2021-11-16 20:57:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:57:45,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) Word has length 142 [2021-11-16 20:57:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:45,529 INFO L225 Difference]: With dead ends: 265 [2021-11-16 20:57:45,529 INFO L226 Difference]: Without dead ends: 219 [2021-11-16 20:57:45,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:57:45,530 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 84 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:45,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 367 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-16 20:57:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-16 20:57:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2021-11-16 20:57:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 146 states have internal predecessors, (156), 48 states have call successors, (48), 21 states have call predecessors, (48), 23 states have return successors, (59), 47 states have call predecessors, (59), 46 states have call successors, (59) [2021-11-16 20:57:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 263 transitions. [2021-11-16 20:57:45,540 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 263 transitions. Word has length 142 [2021-11-16 20:57:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:45,540 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 263 transitions. [2021-11-16 20:57:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-16 20:57:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 263 transitions. [2021-11-16 20:57:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-16 20:57:45,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:45,542 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-16 20:57:45,542 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -172709700, now seen corresponding path program 1 times [2021-11-16 20:57:45,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:45,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396025339] [2021-11-16 20:57:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:45,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:57:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:57:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:57:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:57:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:57:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:57:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:57:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:57:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:57:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 20:57:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:57:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 20:57:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-16 20:57:45,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:45,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396025339] [2021-11-16 20:57:45,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396025339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:57:45,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:57:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-16 20:57:45,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517137851] [2021-11-16 20:57:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:57:45,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 20:57:45,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:57:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 20:57:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:57:45,862 INFO L87 Difference]: Start difference. First operand 215 states and 263 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-16 20:57:48,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:57:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:57:49,487 INFO L93 Difference]: Finished difference Result 221 states and 268 transitions. [2021-11-16 20:57:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-16 20:57:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 151 [2021-11-16 20:57:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:57:49,488 INFO L225 Difference]: With dead ends: 221 [2021-11-16 20:57:49,488 INFO L226 Difference]: Without dead ends: 219 [2021-11-16 20:57:49,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:57:49,489 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 95 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:57:49,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 773 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-16 20:57:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-16 20:57:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-11-16 20:57:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 146 states have internal predecessors, (156), 46 states have call successors, (46), 21 states have call predecessors, (46), 23 states have return successors, (57), 45 states have call predecessors, (57), 44 states have call successors, (57) [2021-11-16 20:57:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-11-16 20:57:49,503 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 151 [2021-11-16 20:57:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:57:49,503 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-11-16 20:57:49,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-16 20:57:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2021-11-16 20:57:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-16 20:57:49,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:57:49,505 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:57:49,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-16 20:57:49,505 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:57:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:57:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1844682897, now seen corresponding path program 1 times [2021-11-16 20:57:49,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:57:49,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917461246] [2021-11-16 20:57:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:49,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:57:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:57:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:57:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:57:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:57:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:57:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:57:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:57:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:57:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:57:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:57:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:57:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 20:57:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 20:57:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:57:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 20:57:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-16 20:57:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 20:57:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-16 20:57:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-16 20:57:49,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:57:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917461246] [2021-11-16 20:57:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917461246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:57:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672422861] [2021-11-16 20:57:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:57:49,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:57:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:57:49,841 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) [2021-11-16 20:57:49,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 20:57:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:57:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-16 20:57:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:57:50,189 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 [2021-11-16 20:57:50,339 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:57:50,339 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 [2021-11-16 20:57:50,991 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:57:50,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 29 [2021-11-16 20:57:51,036 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 [2021-11-16 20:57:53,222 INFO L354 Elim1Store]: treesize reduction 256, result has 23.1 percent of original size [2021-11-16 20:57:53,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 87 treesize of output 139 [2021-11-16 20:57:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:53,857 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 0 case distinctions, treesize of input 65 treesize of output 39 [2021-11-16 20:57:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:57:53,948 INFO L354 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2021-11-16 20:57:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 46 [2021-11-16 20:57:55,086 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:57:55,087 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 1 case distinctions, treesize of input 72 treesize of output 50 [2021-11-16 20:57:55,119 INFO L354 Elim1Store]: treesize reduction 89, result has 13.6 percent of original size [2021-11-16 20:57:55,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 86 [2021-11-16 20:58:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-16 20:58:32,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:58:33,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672422861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:33,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:58:33,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 30 [2021-11-16 20:58:33,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465317996] [2021-11-16 20:58:33,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:58:33,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-16 20:58:33,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:58:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-16 20:58:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=924, Unknown=10, NotChecked=0, Total=1056 [2021-11-16 20:58:33,310 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2021-11-16 20:58:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:58:47,981 INFO L93 Difference]: Finished difference Result 336 states and 390 transitions. [2021-11-16 20:58:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-16 20:58:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 154 [2021-11-16 20:58:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:58:47,983 INFO L225 Difference]: With dead ends: 336 [2021-11-16 20:58:47,983 INFO L226 Difference]: Without dead ends: 246 [2021-11-16 20:58:47,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=281, Invalid=2057, Unknown=14, NotChecked=0, Total=2352 [2021-11-16 20:58:47,984 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 254 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 702 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:58:47,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 544 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 622 Invalid, 0 Unknown, 702 Unchecked, 3.4s Time] [2021-11-16 20:58:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-16 20:58:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-11-16 20:58:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 165 states have internal predecessors, (176), 46 states have call successors, (46), 24 states have call predecessors, (46), 26 states have return successors, (57), 46 states have call predecessors, (57), 44 states have call successors, (57) [2021-11-16 20:58:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 279 transitions. [2021-11-16 20:58:47,995 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 279 transitions. Word has length 154 [2021-11-16 20:58:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:58:47,995 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 279 transitions. [2021-11-16 20:58:47,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 25 states have internal predecessors, (140), 10 states have call successors, (39), 11 states have call predecessors, (39), 11 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2021-11-16 20:58:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 279 transitions. [2021-11-16 20:58:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-16 20:58:47,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:58:47,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:58:48,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:58:48,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:48,212 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:58:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:58:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash -634804810, now seen corresponding path program 1 times [2021-11-16 20:58:48,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:58:48,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580081925] [2021-11-16 20:58:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:48,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:58:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:58:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:58:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 20:58:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:58:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:58:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 20:58:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:58:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:58:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:58:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:58:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:58:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 20:58:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:58:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 20:58:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 20:58:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 20:58:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 20:58:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-16 20:58:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-16 20:58:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-16 20:58:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-16 20:58:48,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:58:48,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580081925] [2021-11-16 20:58:48,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580081925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:58:48,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075935006] [2021-11-16 20:58:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:58:48,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:58:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:58:48,866 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) [2021-11-16 20:58:48,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 20:58:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:58:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-16 20:58:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:58:49,238 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 [2021-11-16 20:58:49,781 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:58:49,781 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 [2021-11-16 20:58:51,622 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-16 20:58:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 29 [2021-11-16 20:58:51,751 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 [2021-11-16 20:58:54,279 INFO L354 Elim1Store]: treesize reduction 256, result has 23.1 percent of original size [2021-11-16 20:58:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 87 treesize of output 139 [2021-11-16 20:59:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:59:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:59:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:59:01,386 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 0 case distinctions, treesize of input 74 treesize of output 44 [2021-11-16 20:59:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:59:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:59:01,600 INFO L354 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2021-11-16 20:59:01,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 51 [2021-11-16 20:59:02,374 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 20:59:02,374 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 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-16 20:59:02,459 INFO L354 Elim1Store]: treesize reduction 89, result has 13.6 percent of original size [2021-11-16 20:59:02,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 90 [2021-11-16 20:59:14,501 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 34 treesize of output 19 [2021-11-16 20:59:17,359 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 34 treesize of output 19 [2021-11-16 20:59:17,556 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 34 treesize of output 19 [2021-11-16 20:59:21,960 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 34 treesize of output 19 [2021-11-16 20:59:23,302 INFO L354 Elim1Store]: treesize reduction 1227, result has 11.2 percent of original size [2021-11-16 20:59:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 142 treesize of output 222 [2021-11-16 21:00:09,458 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 17 treesize of output 9 [2021-11-16 21:00:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 48 proven. 98 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-16 21:00:09,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:00:11,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075935006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:00:11,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:00:11,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 30] total 38 [2021-11-16 21:00:11,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559505730] [2021-11-16 21:00:11,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:00:11,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 21:00:11,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:00:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 21:00:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1622, Unknown=8, NotChecked=0, Total=1806 [2021-11-16 21:00:11,313 INFO L87 Difference]: Start difference. First operand 236 states and 279 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 33 states have internal predecessors, (136), 17 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-11-16 21:00:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:00:33,249 INFO L93 Difference]: Finished difference Result 372 states and 450 transitions. [2021-11-16 21:00:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-16 21:00:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 33 states have internal predecessors, (136), 17 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) Word has length 163 [2021-11-16 21:00:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:00:33,251 INFO L225 Difference]: With dead ends: 372 [2021-11-16 21:00:33,251 INFO L226 Difference]: Without dead ends: 310 [2021-11-16 21:00:33,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 226 SyntacticMatches, 20 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=414, Invalid=3861, Unknown=15, NotChecked=0, Total=4290 [2021-11-16 21:00:33,253 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 202 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1103 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:00:33,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 689 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1018 Invalid, 0 Unknown, 1103 Unchecked, 5.3s Time] [2021-11-16 21:00:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-16 21:00:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 293. [2021-11-16 21:00:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 206 states have (on average 1.087378640776699) internal successors, (224), 209 states have internal predecessors, (224), 55 states have call successors, (55), 30 states have call predecessors, (55), 31 states have return successors, (64), 53 states have call predecessors, (64), 51 states have call successors, (64) [2021-11-16 21:00:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 343 transitions. [2021-11-16 21:00:33,267 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 343 transitions. Word has length 163 [2021-11-16 21:00:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:00:33,267 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 343 transitions. [2021-11-16 21:00:33,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 33 states have internal predecessors, (136), 17 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-11-16 21:00:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 343 transitions. [2021-11-16 21:00:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-16 21:00:33,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:00:33,268 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 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, 1] [2021-11-16 21:00:33,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 21:00:33,489 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,SelfDestructingSolverStorable32 [2021-11-16 21:00:33,489 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:00:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:00:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 513147373, now seen corresponding path program 1 times [2021-11-16 21:00:33,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:00:33,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149359661] [2021-11-16 21:00:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:33,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:00:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:00:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:00:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:00:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:00:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:00:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:00:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:00:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:00:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:00:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:00:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:00:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 21:00:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:00:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:00:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:00:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 21:00:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-16 21:00:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-16 21:00:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-16 21:00:33,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:00:33,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149359661] [2021-11-16 21:00:33,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149359661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:00:33,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739627817] [2021-11-16 21:00:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:33,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:00:33,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:00:33,963 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) [2021-11-16 21:00:33,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 21:00:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-16 21:00:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:00:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 21:00:35,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:00:35,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739627817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:00:35,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:00:35,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-16 21:00:35,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71256581] [2021-11-16 21:00:35,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:00:35,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:00:35,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:00:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:00:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:00:35,699 INFO L87 Difference]: Start difference. First operand 293 states and 343 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:00:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:00:35,946 INFO L93 Difference]: Finished difference Result 376 states and 431 transitions. [2021-11-16 21:00:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:00:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 163 [2021-11-16 21:00:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:00:35,957 INFO L225 Difference]: With dead ends: 376 [2021-11-16 21:00:35,957 INFO L226 Difference]: Without dead ends: 264 [2021-11-16 21:00:35,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:00:35,958 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:00:35,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 375 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2021-11-16 21:00:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-16 21:00:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2021-11-16 21:00:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 187 states have internal predecessors, (200), 44 states have call successors, (44), 27 states have call predecessors, (44), 28 states have return successors, (49), 42 states have call predecessors, (49), 41 states have call successors, (49) [2021-11-16 21:00:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 293 transitions. [2021-11-16 21:00:35,969 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 293 transitions. Word has length 163 [2021-11-16 21:00:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:00:35,970 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 293 transitions. [2021-11-16 21:00:35,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:00:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 293 transitions. [2021-11-16 21:00:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-16 21:00:35,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:00:35,971 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-11-16 21:00:35,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 21:00:36,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:00:36,180 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:00:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:00:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1527377470, now seen corresponding path program 2 times [2021-11-16 21:00:36,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:00:36,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592255471] [2021-11-16 21:00:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:00:36,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:00:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:00:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:00:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:00:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:36,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:36,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:00:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:00:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:00:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:00:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:00:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:00:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:00:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:00:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:00:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 21:00:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:00:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:00:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 21:00:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-16 21:00:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-16 21:00:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-16 21:00:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:00:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-16 21:00:38,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:00:38,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592255471] [2021-11-16 21:00:38,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592255471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:00:38,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575367928] [2021-11-16 21:00:38,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:00:38,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:00:38,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:00:38,235 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) [2021-11-16 21:00:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 21:00:43,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:00:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:00:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-16 21:00:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:00:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:00:51,678 INFO L354 Elim1Store]: treesize reduction 51, result has 42.0 percent of original size [2021-11-16 21:00:51,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 59 [2021-11-16 21:00:55,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:00:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-16 21:00:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 163 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-16 21:00:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:00:56,132 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:00:56,132 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 119 treesize of output 113 [2021-11-16 21:00:56,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-16 21:00:56,161 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 101 treesize of output 93 [2021-11-16 21:01:06,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575367928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:01:06,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:01:06,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 40 [2021-11-16 21:01:06,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918670420] [2021-11-16 21:01:06,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:01:06,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-16 21:01:06,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:01:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-16 21:01:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1983, Unknown=3, NotChecked=0, Total=2162 [2021-11-16 21:01:06,148 INFO L87 Difference]: Start difference. First operand 257 states and 293 transitions. Second operand has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 36 states have internal predecessors, (150), 21 states have call successors, (41), 7 states have call predecessors, (41), 11 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) [2021-11-16 21:01:08,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:01:12,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:01:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:01:22,069 INFO L93 Difference]: Finished difference Result 349 states and 397 transitions. [2021-11-16 21:01:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-16 21:01:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 36 states have internal predecessors, (150), 21 states have call successors, (41), 7 states have call predecessors, (41), 11 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) Word has length 169 [2021-11-16 21:01:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:01:22,071 INFO L225 Difference]: With dead ends: 349 [2021-11-16 21:01:22,071 INFO L226 Difference]: Without dead ends: 275 [2021-11-16 21:01:22,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 271 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=511, Invalid=5036, Unknown=3, NotChecked=0, Total=5550 [2021-11-16 21:01:22,073 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 215 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:01:22,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 678 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2182 Invalid, 0 Unknown, 600 Unchecked, 11.9s Time] [2021-11-16 21:01:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-16 21:01:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 265. [2021-11-16 21:01:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.08994708994709) internal successors, (206), 193 states have internal predecessors, (206), 46 states have call successors, (46), 28 states have call predecessors, (46), 29 states have return successors, (50), 43 states have call predecessors, (50), 43 states have call successors, (50) [2021-11-16 21:01:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2021-11-16 21:01:22,088 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 169 [2021-11-16 21:01:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:01:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2021-11-16 21:01:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 36 states have internal predecessors, (150), 21 states have call successors, (41), 7 states have call predecessors, (41), 11 states have return successors, (40), 18 states have call predecessors, (40), 21 states have call successors, (40) [2021-11-16 21:01:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2021-11-16 21:01:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-16 21:01:22,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:01:22,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:01:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 21:01:22,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:01:22,304 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:01:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:01:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash 755558594, now seen corresponding path program 1 times [2021-11-16 21:01:22,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:01:22,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334535805] [2021-11-16 21:01:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:01:22,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:01:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:01:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:01:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:01:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:01:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:01:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:01:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:01:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:23,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:01:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:01:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:01:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:01:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:01:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:01:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:01:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:01:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:01:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-16 21:01:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:01:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:01:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-16 21:01:24,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:01:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334535805] [2021-11-16 21:01:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334535805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:01:24,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:01:24,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-16 21:01:24,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945017247] [2021-11-16 21:01:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:01:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:01:24,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:01:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:01:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-16 21:01:24,603 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 13 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-16 21:01:29,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:01:35,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:01:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:01:41,032 INFO L93 Difference]: Finished difference Result 285 states and 327 transitions. [2021-11-16 21:01:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 21:01:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 13 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 172 [2021-11-16 21:01:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:01:41,034 INFO L225 Difference]: With dead ends: 285 [2021-11-16 21:01:41,034 INFO L226 Difference]: Without dead ends: 272 [2021-11-16 21:01:41,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-11-16 21:01:41,035 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 101 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 100 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:01:41,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 543 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1921 Invalid, 2 Unknown, 0 Unchecked, 15.1s Time] [2021-11-16 21:01:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-16 21:01:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-16 21:01:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 190 states have (on average 1.0894736842105264) internal successors, (207), 194 states have internal predecessors, (207), 48 states have call successors, (48), 28 states have call predecessors, (48), 29 states have return successors, (53), 45 states have call predecessors, (53), 45 states have call successors, (53) [2021-11-16 21:01:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 308 transitions. [2021-11-16 21:01:41,049 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 308 transitions. Word has length 172 [2021-11-16 21:01:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:01:41,049 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 308 transitions. [2021-11-16 21:01:41,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 13 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-16 21:01:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 308 transitions. [2021-11-16 21:01:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-16 21:01:41,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:01:41,051 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:01:41,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-16 21:01:41,051 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:01:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:01:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -637391594, now seen corresponding path program 2 times [2021-11-16 21:01:41,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:01:41,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330017775] [2021-11-16 21:01:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:01:41,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:01:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:01:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:01:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:01:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:46,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:01:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:01:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:46,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:01:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:01:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:47,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:01:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:01:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:01:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:01:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:01:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 21:01:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 21:01:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:01:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 21:01:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 21:01:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-16 21:01:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-16 21:01:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-16 21:01:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:01:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-16 21:01:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:01:48,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330017775] [2021-11-16 21:01:48,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330017775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:01:48,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187420480] [2021-11-16 21:01:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:01:48,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:01:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:01:48,908 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) [2021-11-16 21:01:48,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 21:01:50,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:01:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:01:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-16 21:01:50,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:01:50,716 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 [2021-11-16 21:01:52,093 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 21:01:52,093 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 [2021-11-16 21:01:52,649 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 [2021-11-16 21:01:52,659 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 24 treesize of output 20 [2021-11-16 21:01:52,678 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 25 treesize of output 13 [2021-11-16 21:01:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:55,056 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 21:01:55,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-16 21:01:55,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-16 21:01:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:01:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-16 21:01:55,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:01:55,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2021-11-16 21:01:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:57,922 INFO L354 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2021-11-16 21:01:57,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 236 [2021-11-16 21:01:57,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:01:57,961 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-16 21:01:57,962 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 324 treesize of output 272 [2021-11-16 21:01:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:01:57,996 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-16 21:01:57,997 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 260 treesize of output 196 [2021-11-16 21:01:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,105 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-16 21:01:58,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 99 [2021-11-16 21:01:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,192 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-16 21:01:58,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 101 [2021-11-16 21:01:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:01:58,685 INFO L354 Elim1Store]: treesize reduction 60, result has 26.8 percent of original size [2021-11-16 21:01:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 28 treesize of output 36 [2021-11-16 21:02:12,793 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 0 case distinctions, treesize of input 83 treesize of output 78 [2021-11-16 21:02:12,799 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 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-16 21:02:12,805 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 70 treesize of output 71 [2021-11-16 21:02:12,816 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 52 treesize of output 53 [2021-11-16 21:02:12,822 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 39 treesize of output 24 [2021-11-16 21:02:12,827 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 13 [2021-11-16 21:02:13,514 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 0 case distinctions, treesize of input 83 treesize of output 78 [2021-11-16 21:02:13,521 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 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-16 21:02:13,526 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 70 treesize of output 71 [2021-11-16 21:02:13,532 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 54 treesize of output 55 [2021-11-16 21:02:13,538 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 39 treesize of output 24 [2021-11-16 21:02:13,543 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 13 [2021-11-16 21:02:14,207 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 0 case distinctions, treesize of input 83 treesize of output 78 [2021-11-16 21:02:14,212 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 75 treesize of output 76 [2021-11-16 21:02:14,218 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 0 case distinctions, treesize of input 60 treesize of output 55 [2021-11-16 21:02:14,223 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 52 treesize of output 53 [2021-11-16 21:02:14,228 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 39 treesize of output 24 [2021-11-16 21:02:14,234 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 13 [2021-11-16 21:02:23,670 WARN L227 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 56 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:02:23,682 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 0 case distinctions, treesize of input 83 treesize of output 78 [2021-11-16 21:02:23,687 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 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-16 21:02:23,692 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 70 treesize of output 71 [2021-11-16 21:02:23,697 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 54 treesize of output 55 [2021-11-16 21:02:23,702 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 39 treesize of output 24 [2021-11-16 21:02:23,707 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 13 [2021-11-16 21:02:25,329 INFO L354 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2021-11-16 21:02:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 183 treesize of output 175 [2021-11-16 21:02:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:02:25,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:02:25,460 INFO L354 Elim1Store]: treesize reduction 258, result has 12.5 percent of original size [2021-11-16 21:02:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 178 treesize of output 170 [2021-11-16 21:02:25,494 INFO L354 Elim1Store]: treesize reduction 36, result has 12.2 percent of original size [2021-11-16 21:02:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 154 treesize of output 152 [2021-11-16 21:02:25,546 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-16 21:02:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 149 [2021-11-16 21:02:25,554 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 134 treesize of output 135 [2021-11-16 21:02:25,560 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 116 treesize of output 117 [2021-11-16 21:02:52,201 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 107 treesize of output 87 [2021-11-16 21:02:52,207 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 84 treesize of output 76 [2021-11-16 21:02:53,584 INFO L354 Elim1Store]: treesize reduction 120, result has 7.0 percent of original size [2021-11-16 21:02:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 80 [2021-11-16 21:02:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 96 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 21:02:54,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:03:09,036 WARN L227 SmtUtils]: Spent 7.80s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:03:23,880 WARN L227 SmtUtils]: Spent 10.80s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:03:37,397 WARN L227 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:03:47,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187420480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:03:47,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:03:47,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49] total 79 [2021-11-16 21:03:47,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597711225] [2021-11-16 21:03:47,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:03:47,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-16 21:03:47,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:03:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-16 21:03:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=7854, Unknown=3, NotChecked=0, Total=8190 [2021-11-16 21:03:47,299 INFO L87 Difference]: Start difference. First operand 268 states and 308 transitions. Second operand has 79 states, 68 states have (on average 2.6176470588235294) internal successors, (178), 66 states have internal predecessors, (178), 26 states have call successors, (43), 13 states have call predecessors, (43), 16 states have return successors, (40), 19 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-16 21:03:49,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:04:40,622 WARN L227 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 67 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:04:49,574 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 79 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:04:58,325 WARN L227 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 72 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:05:10,364 WARN L227 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 74 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:05:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:05:25,980 INFO L93 Difference]: Finished difference Result 377 states and 431 transitions. [2021-11-16 21:05:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-16 21:05:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 68 states have (on average 2.6176470588235294) internal successors, (178), 66 states have internal predecessors, (178), 26 states have call successors, (43), 13 states have call predecessors, (43), 16 states have return successors, (40), 19 states have call predecessors, (40), 22 states have call successors, (40) Word has length 175 [2021-11-16 21:05:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:05:25,982 INFO L225 Difference]: With dead ends: 377 [2021-11-16 21:05:25,983 INFO L226 Difference]: Without dead ends: 271 [2021-11-16 21:05:25,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 192 SyntacticMatches, 23 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7953 ImplicationChecksByTransitivity, 183.7s TimeCoverageRelationStatistics Valid=1005, Invalid=22240, Unknown=11, NotChecked=0, Total=23256 [2021-11-16 21:05:25,985 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 171 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 4423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1858 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:05:25,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2095 Invalid, 4423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2470 Invalid, 0 Unknown, 1858 Unchecked, 18.2s Time] [2021-11-16 21:05:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-16 21:05:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2021-11-16 21:05:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 186 states have internal predecessors, (197), 47 states have call successors, (47), 27 states have call predecessors, (47), 29 states have return successors, (62), 45 states have call predecessors, (62), 44 states have call successors, (62) [2021-11-16 21:05:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 306 transitions. [2021-11-16 21:05:25,999 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 306 transitions. Word has length 175 [2021-11-16 21:05:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:05:26,000 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 306 transitions. [2021-11-16 21:05:26,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 68 states have (on average 2.6176470588235294) internal successors, (178), 66 states have internal predecessors, (178), 26 states have call successors, (43), 13 states have call predecessors, (43), 16 states have return successors, (40), 19 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-16 21:05:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 306 transitions. [2021-11-16 21:05:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-16 21:05:26,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:05:26,001 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:05:26,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 21:05:26,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:05:26,225 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:05:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:05:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash 805323361, now seen corresponding path program 1 times [2021-11-16 21:05:26,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:05:26,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542344645] [2021-11-16 21:05:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:05:26,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:05:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:05:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:05:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:05:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:05:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:05:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:05:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:05:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:05:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:05:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:05:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:05:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:05:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:05:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:05:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:05:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:05:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-16 21:05:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:05:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:26,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:05:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:27,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-16 21:05:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-16 21:05:27,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:05:27,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542344645] [2021-11-16 21:05:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542344645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:05:27,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:05:27,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 21:05:27,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926362834] [2021-11-16 21:05:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:05:27,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:05:27,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:05:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:05:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:05:27,133 INFO L87 Difference]: Start difference. First operand 259 states and 306 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:05:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:05:31,667 INFO L93 Difference]: Finished difference Result 280 states and 327 transitions. [2021-11-16 21:05:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:05:31,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 178 [2021-11-16 21:05:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:05:31,668 INFO L225 Difference]: With dead ends: 280 [2021-11-16 21:05:31,668 INFO L226 Difference]: Without dead ends: 263 [2021-11-16 21:05:31,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:05:31,669 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 66 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:05:31,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 400 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-16 21:05:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-16 21:05:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2021-11-16 21:05:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 186 states have internal predecessors, (197), 47 states have call successors, (47), 27 states have call predecessors, (47), 29 states have return successors, (60), 45 states have call predecessors, (60), 44 states have call successors, (60) [2021-11-16 21:05:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 304 transitions. [2021-11-16 21:05:31,682 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 304 transitions. Word has length 178 [2021-11-16 21:05:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:05:31,683 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 304 transitions. [2021-11-16 21:05:31,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-16 21:05:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 304 transitions. [2021-11-16 21:05:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-16 21:05:31,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:05:31,684 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-11-16 21:05:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-16 21:05:31,685 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:05:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:05:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1738877282, now seen corresponding path program 3 times [2021-11-16 21:05:31,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:05:31,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201245918] [2021-11-16 21:05:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:05:31,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:05:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:31,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:05:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:31,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:05:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:05:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:05:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:05:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:05:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:05:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:05:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:33,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:05:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:05:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:05:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:05:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:05:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 21:05:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 21:05:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 21:05:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:05:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:05:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 21:05:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:05:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 21:05:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:05:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 39 proven. 62 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-16 21:05:34,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:05:34,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201245918] [2021-11-16 21:05:34,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201245918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:05:34,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746427877] [2021-11-16 21:05:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:05:34,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:05:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:05:34,570 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) [2021-11-16 21:05:34,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 21:05:41,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-16 21:05:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:05:41,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-16 21:05:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:05:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:05:50,536 INFO L354 Elim1Store]: treesize reduction 51, result has 42.0 percent of original size [2021-11-16 21:05:50,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 59 [2021-11-16 21:05:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:05:52,008 INFO L354 Elim1Store]: treesize reduction 51, result has 42.0 percent of original size [2021-11-16 21:05:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 97 [2021-11-16 21:05:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 119 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-16 21:05:58,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:06:02,006 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-16 21:06:02,006 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 3935 treesize of output 3569 [2021-11-16 21:06:02,569 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 1011 treesize of output 1005 [2021-11-16 21:06:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 1011 treesize of output 1005 [2021-11-16 21:06:03,526 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 1011 treesize of output 1005 [2021-11-16 21:06:15,715 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-16 21:06:15,715 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 673 treesize of output 581 [2021-11-16 21:06:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746427877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:06:18,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:06:18,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 43 [2021-11-16 21:06:18,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546818650] [2021-11-16 21:06:18,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:06:18,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-16 21:06:18,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:06:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-16 21:06:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2459, Unknown=1, NotChecked=0, Total=2652 [2021-11-16 21:06:18,593 INFO L87 Difference]: Start difference. First operand 259 states and 304 transitions. Second operand has 43 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 23 states have call successors, (43), 6 states have call predecessors, (43), 9 states have return successors, (42), 20 states have call predecessors, (42), 23 states have call successors, (42) [2021-11-16 21:06:21,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:06:25,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:06:27,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:06:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:06:48,722 INFO L93 Difference]: Finished difference Result 341 states and 410 transitions. [2021-11-16 21:06:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-16 21:06:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 23 states have call successors, (43), 6 states have call predecessors, (43), 9 states have return successors, (42), 20 states have call predecessors, (42), 23 states have call successors, (42) Word has length 178 [2021-11-16 21:06:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:06:48,724 INFO L225 Difference]: With dead ends: 341 [2021-11-16 21:06:48,724 INFO L226 Difference]: Without dead ends: 272 [2021-11-16 21:06:48,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 224 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=548, Invalid=6591, Unknown=1, NotChecked=0, Total=7140 [2021-11-16 21:06:48,725 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 250 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 282 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:06:48,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 809 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2336 Invalid, 1 Unknown, 787 Unchecked, 18.7s Time] [2021-11-16 21:06:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-16 21:06:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 231. [2021-11-16 21:06:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 166 states have (on average 1.0783132530120483) internal successors, (179), 169 states have internal predecessors, (179), 38 states have call successors, (38), 25 states have call predecessors, (38), 26 states have return successors, (48), 36 states have call predecessors, (48), 36 states have call successors, (48) [2021-11-16 21:06:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 265 transitions. [2021-11-16 21:06:48,739 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 265 transitions. Word has length 178 [2021-11-16 21:06:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:06:48,739 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 265 transitions. [2021-11-16 21:06:48,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 23 states have call successors, (43), 6 states have call predecessors, (43), 9 states have return successors, (42), 20 states have call predecessors, (42), 23 states have call successors, (42) [2021-11-16 21:06:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 265 transitions. [2021-11-16 21:06:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-16 21:06:48,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:06:48,740 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 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, 1] [2021-11-16 21:06:48,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 21:06:48,954 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,SelfDestructingSolverStorable38 [2021-11-16 21:06:48,954 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:06:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:06:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 829434654, now seen corresponding path program 1 times [2021-11-16 21:06:48,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:06:48,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874643617] [2021-11-16 21:06:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:06:48,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:06:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:49,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:06:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:49,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:06:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:06:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:06:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:06:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:06:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:06:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:06:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:06:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:06:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:06:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:06:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:06:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 21:06:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 21:06:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:06:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 21:06:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 21:06:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-16 21:06:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-16 21:06:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 56 proven. 5 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-16 21:06:51,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:06:51,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874643617] [2021-11-16 21:06:51,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874643617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:06:51,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181715703] [2021-11-16 21:06:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:06:51,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:06:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:06:51,613 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) [2021-11-16 21:06:51,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 21:06:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:06:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-16 21:06:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:06:53,438 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 [2021-11-16 21:06:54,096 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-16 21:06:54,096 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 1 case distinctions, treesize of input 14 treesize of output 9 [2021-11-16 21:06:54,535 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 21 treesize of output 17 [2021-11-16 21:06:55,986 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-16 21:06:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-16 21:06:56,202 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 32 treesize of output 16 [2021-11-16 21:06:58,703 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-16 21:06:58,703 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 40 treesize of output 20 [2021-11-16 21:07:05,706 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:05,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-11-16 21:07:05,827 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 23 treesize of output 22 [2021-11-16 21:07:05,966 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:07:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-16 21:07:06,166 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-11-16 21:07:06,608 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:07:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-16 21:07:12,932 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-11-16 21:07:12,991 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 23 treesize of output 22 [2021-11-16 21:07:13,137 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:07:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-16 21:07:13,297 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:13,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-11-16 21:07:13,503 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:07:13,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2021-11-16 21:07:13,850 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 43 [2021-11-16 21:07:14,178 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:07:14,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-16 21:07:16,604 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:07:16,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 54 [2021-11-16 21:07:16,643 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 21 treesize of output 20 [2021-11-16 21:07:17,352 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 20 treesize of output 19 [2021-11-16 21:07:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 112 proven. 112 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-16 21:07:25,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:07:29,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181715703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:07:29,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:07:29,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 42 [2021-11-16 21:07:29,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481838705] [2021-11-16 21:07:29,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:07:29,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-16 21:07:29,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:07:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-16 21:07:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2156, Unknown=7, NotChecked=0, Total=2352 [2021-11-16 21:07:29,709 INFO L87 Difference]: Start difference. First operand 231 states and 265 transitions. Second operand has 42 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 35 states have internal predecessors, (143), 17 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (39), 20 states have call predecessors, (39), 16 states have call successors, (39) [2021-11-16 21:07:31,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:32,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:34,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:35,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:37,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:39,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:07:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:07:54,998 INFO L93 Difference]: Finished difference Result 306 states and 353 transitions. [2021-11-16 21:07:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-16 21:07:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 35 states have internal predecessors, (143), 17 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (39), 20 states have call predecessors, (39), 16 states have call successors, (39) Word has length 181 [2021-11-16 21:07:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:07:55,000 INFO L225 Difference]: With dead ends: 306 [2021-11-16 21:07:55,000 INFO L226 Difference]: Without dead ends: 284 [2021-11-16 21:07:55,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 224 SyntacticMatches, 21 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=437, Invalid=4809, Unknown=10, NotChecked=0, Total=5256 [2021-11-16 21:07:55,002 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 149 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 112 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 974 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:07:55,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 733 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 819 Invalid, 1 Unknown, 974 Unchecked, 13.8s Time] [2021-11-16 21:07:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-16 21:07:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 261. [2021-11-16 21:07:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 187 states have (on average 1.0802139037433156) internal successors, (202), 191 states have internal predecessors, (202), 44 states have call successors, (44), 27 states have call predecessors, (44), 29 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-11-16 21:07:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2021-11-16 21:07:55,020 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 181 [2021-11-16 21:07:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:07:55,021 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2021-11-16 21:07:55,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 35 states have internal predecessors, (143), 17 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (39), 20 states have call predecessors, (39), 16 states have call successors, (39) [2021-11-16 21:07:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2021-11-16 21:07:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-16 21:07:55,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:07:55,022 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-16 21:07:55,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 21:07:55,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-16 21:07:55,235 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:07:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:07:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1181056314, now seen corresponding path program 3 times [2021-11-16 21:07:55,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:07:55,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698372314] [2021-11-16 21:07:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:07:55,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:07:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 21:08:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 21:08:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-16 21:08:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:08:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 21:08:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 21:08:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 21:08:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 21:08:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:08:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:08:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:08:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 21:08:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 21:08:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:08:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 21:08:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:08:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:08:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 21:08:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:08:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 21:08:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-16 21:08:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:08:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-16 21:08:07,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:08:07,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698372314] [2021-11-16 21:08:07,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698372314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:08:07,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34939495] [2021-11-16 21:08:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:08:07,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:08:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:08:07,708 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) [2021-11-16 21:08:07,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 21:08:11,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-16 21:08:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:08:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 238 conjunts are in the unsatisfiable core [2021-11-16 21:08:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:08:12,021 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 [2021-11-16 21:08:16,138 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 21:08:16,139 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 18 treesize of output 20 [2021-11-16 21:08:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:17,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:17,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:08:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-16 21:08:17,097 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 25 treesize of output 21 [2021-11-16 21:08:17,174 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-16 21:08:17,174 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 23 treesize of output 22 [2021-11-16 21:08:22,443 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-16 21:08:22,444 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 28 treesize of output 26 [2021-11-16 21:08:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:23,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:08:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-16 21:08:23,151 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 34 treesize of output 16 [2021-11-16 21:08:23,178 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 34 treesize of output 16 [2021-11-16 21:08:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:26,110 INFO L354 Elim1Store]: treesize reduction 308, result has 14.7 percent of original size [2021-11-16 21:08:26,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 184 treesize of output 230 [2021-11-16 21:08:26,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:08:26,164 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-16 21:08:26,165 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 282 treesize of output 242 [2021-11-16 21:08:26,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 21:08:26,210 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-11-16 21:08:26,211 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 233 treesize of output 193 [2021-11-16 21:08:26,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-16 21:08:26,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:08:26,449 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-11-16 21:08:26,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 99 [2021-11-16 21:08:27,116 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 70 treesize of output 62 [2021-11-16 21:08:27,306 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-11-16 21:08:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 65 [2021-11-16 21:08:27,319 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 79 treesize of output 75 [2021-11-16 21:08:34,420 INFO L354 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2021-11-16 21:08:34,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 109 treesize of output 117 [2021-11-16 21:08:34,543 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-11-16 21:08:34,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 117 treesize of output 125 [2021-11-16 21:08:34,723 INFO L354 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2021-11-16 21:08:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 124 [2021-11-16 21:08:35,334 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 23 treesize of output 22 [2021-11-16 21:08:35,496 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:08:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-16 21:08:37,758 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 25 treesize of output 24 [2021-11-16 21:08:37,921 INFO L354 Elim1Store]: treesize reduction 52, result has 25.7 percent of original size [2021-11-16 21:08:37,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2021-11-16 21:08:48,902 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:08:55,775 WARN L227 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:09:02,548 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:09:02,805 INFO L354 Elim1Store]: treesize reduction 43, result has 29.5 percent of original size [2021-11-16 21:09:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 198 treesize of output 202 [2021-11-16 21:09:02,943 INFO L354 Elim1Store]: treesize reduction 49, result has 26.9 percent of original size [2021-11-16 21:09:02,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 202 treesize of output 206 [2021-11-16 21:09:03,069 INFO L354 Elim1Store]: treesize reduction 44, result has 29.0 percent of original size [2021-11-16 21:09:03,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 206 treesize of output 210 [2021-11-16 21:09:03,232 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 37 treesize of output 15 [2021-11-16 21:09:03,434 INFO L354 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2021-11-16 21:09:03,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 27 [2021-11-16 21:09:03,804 INFO L354 Elim1Store]: treesize reduction 43, result has 38.6 percent of original size [2021-11-16 21:09:03,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 65 [2021-11-16 21:09:06,964 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 31 treesize of output 22 [2021-11-16 21:09:07,193 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-16 21:09:07,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 33 Killed by 15