./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_array_list_init_dynamic_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 ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:47:31,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:47:31,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:47:31,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:47:31,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:47:31,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:47:31,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:47:31,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:47:31,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:47:31,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:47:31,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:47:31,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:47:31,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:47:31,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:47:31,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:47:31,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:47:31,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:47:31,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:47:31,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:47:31,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:47:31,980 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:47:31,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:47:31,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:47:31,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:47:31,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:47:31,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:47:31,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:47:31,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:47:31,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:47:31,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:47:31,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:47:31,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:47:31,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:47:31,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:47:31,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:47:31,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:47:31,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:47:31,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:47:31,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:47:31,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:47:31,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:47:31,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:47:31,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 10:47:32,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:47:32,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:47:32,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:47:32,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:47:32,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:47:32,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:47:32,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:47:32,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:47:32,038 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:47:32,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:47:32,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:47:32,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:47:32,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:47:32,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:47:32,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:47:32,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:47:32,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:47:32,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:47:32,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:47:32,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:47:32,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:47:32,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:47:32,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:47:32,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:47:32,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:47:32,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:47:32,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:47:32,050 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:47:32,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:47:32,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:47:32,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffbf3b1479afd9aaa2ec45fcd2782998a39316f97238379433376f7ba5094eb5 [2022-07-12 10:47:32,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:47:32,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:47:32,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:47:32,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:47:32,300 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:47:32,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2022-07-12 10:47:32,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cf37c3/33067cb1d81c49d98631d797509382e8/FLAG8caeaa8f8 [2022-07-12 10:47:32,989 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:47:32,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_init_dynamic_harness.i [2022-07-12 10:47:33,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cf37c3/33067cb1d81c49d98631d797509382e8/FLAG8caeaa8f8 [2022-07-12 10:47:33,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cf37c3/33067cb1d81c49d98631d797509382e8 [2022-07-12 10:47:33,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:47:33,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:47:33,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:47:33,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:47:33,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:47:33,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:47:33" (1/1) ... [2022-07-12 10:47:33,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21be337c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:33, skipping insertion in model container [2022-07-12 10:47:33,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:47:33" (1/1) ... [2022-07-12 10:47:33,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:47:33,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:47:33,666 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_array_list_init_dynamic_harness.i[4501,4514] [2022-07-12 10:47:33,674 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_array_list_init_dynamic_harness.i[4561,4574] [2022-07-12 10:47:34,288 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 10:47:34,360 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,361 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,362 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,362 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,363 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,371 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,375 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,377 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,377 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,378 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,378 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,379 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,379 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,596 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 10:47:34,597 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 10:47:34,598 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 10:47:34,598 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 10:47:34,599 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 10:47:34,600 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 10:47:34,600 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 10:47:34,601 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 10:47:34,601 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 10:47:34,602 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 10:47:34,725 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,739 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:47:34,848 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:47:34,868 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_array_list_init_dynamic_harness.i[4501,4514] [2022-07-12 10:47:34,869 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_array_list_init_dynamic_harness.i[4561,4574] [2022-07-12 10:47:34,890 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-12 10:47:34,916 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,916 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,925 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,926 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,927 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,932 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,932 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,933 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,933 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,934 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,937 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,938 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,938 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:34,975 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-12 10:47:34,985 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-12 10:47:34,988 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-12 10:47:34,989 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-12 10:47:34,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-12 10:47:34,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-12 10:47:34,995 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-12 10:47:34,997 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-12 10:47:34,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-12 10:47:34,998 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-12 10:47:35,010 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:35,024 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-12 10:47:35,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:47:35,256 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:47:35,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35 WrapperNode [2022-07-12 10:47:35,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:47:35,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:47:35,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:47:35,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:47:35,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,407 INFO L137 Inliner]: procedures = 690, calls = 1561, calls flagged for inlining = 47, calls inlined = 6, statements flattened = 595 [2022-07-12 10:47:35,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:47:35,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:47:35,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:47:35,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:47:35,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:47:35,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:47:35,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:47:35,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:47:35,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (1/1) ... [2022-07-12 10:47:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:47:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:35,554 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) [2022-07-12 10:47:35,564 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 [2022-07-12 10:47:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-12 10:47:35,589 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-12 10:47:35,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:47:35,590 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-12 10:47:35,590 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-12 10:47:35,591 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-12 10:47:35,591 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-12 10:47:35,591 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-07-12 10:47:35,591 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-07-12 10:47:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:47:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-12 10:47:35,592 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-12 10:47:35,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 10:47:35,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 10:47:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:47:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:47:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:47:35,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:47:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:47:35,594 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-12 10:47:35,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-12 10:47:35,594 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-12 10:47:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-12 10:47:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-07-12 10:47:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-07-12 10:47:35,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-12 10:47:35,595 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-12 10:47:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 10:47:35,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 10:47:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-07-12 10:47:35,596 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-07-12 10:47:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:47:35,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:47:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 10:47:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-12 10:47:35,597 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-12 10:47:35,597 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-12 10:47:35,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-12 10:47:35,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:47:35,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:47:35,852 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:47:35,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:47:36,531 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:47:36,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:47:36,542 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:47:36,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:47:36 BoogieIcfgContainer [2022-07-12 10:47:36,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:47:36,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:47:36,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:47:36,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:47:36,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:47:33" (1/3) ... [2022-07-12 10:47:36,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9dec0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:47:36, skipping insertion in model container [2022-07-12 10:47:36,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:47:35" (2/3) ... [2022-07-12 10:47:36,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9dec0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:47:36, skipping insertion in model container [2022-07-12 10:47:36,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:47:36" (3/3) ... [2022-07-12 10:47:36,553 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_init_dynamic_harness.i [2022-07-12 10:47:36,566 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:47:36,567 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:47:36,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:47:36,642 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d60029e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2cbfa428 [2022-07-12 10:47:36,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 10:47:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 10:47:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 10:47:36,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:36,656 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:36,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1457384713, now seen corresponding path program 1 times [2022-07-12 10:47:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887458626] [2022-07-12 10:47:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:36,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:47:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:47:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:47:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:47:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:47:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:47:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-12 10:47:37,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887458626] [2022-07-12 10:47:37,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-12 10:47:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672664149] [2022-07-12 10:47:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:37,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:37,248 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) [2022-07-12 10:47:37,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:47:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-12 10:47:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:37,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:47:37,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672664149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:47:37,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:47:37,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:47:37,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118979665] [2022-07-12 10:47:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:47:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:47:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:47:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:47:37,704 INFO L87 Difference]: Start difference. First operand has 137 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 89 states have internal predecessors, (108), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 10:47:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:37,736 INFO L93 Difference]: Finished difference Result 269 states and 367 transitions. [2022-07-12 10:47:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:47:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-07-12 10:47:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:37,746 INFO L225 Difference]: With dead ends: 269 [2022-07-12 10:47:37,746 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 10:47:37,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:47:37,753 INFO L413 NwaCegarLoop]: 171 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, 171 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 [2022-07-12 10:47:37,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:47:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 10:47:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-12 10:47:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 83 states have internal predecessors, (97), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-12 10:47:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-07-12 10:47:37,819 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 54 [2022-07-12 10:47:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:37,821 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-07-12 10:47:37,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 10:47:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-07-12 10:47:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 10:47:37,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:37,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:37,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:38,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-12 10:47:38,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1798443805, now seen corresponding path program 1 times [2022-07-12 10:47:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551487285] [2022-07-12 10:47:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:38,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:38,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100791231] [2022-07-12 10:47:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:38,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:38,170 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) [2022-07-12 10:47:38,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:47:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:47:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 10:47:38,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:47:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551487285] [2022-07-12 10:47:38,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:38,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100791231] [2022-07-12 10:47:38,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100791231] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:47:38,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:47:38,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-07-12 10:47:38,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493795857] [2022-07-12 10:47:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:47:38,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:47:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:47:38,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:47:38,823 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-12 10:47:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:38,877 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2022-07-12 10:47:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:47:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 60 [2022-07-12 10:47:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:38,880 INFO L225 Difference]: With dead ends: 138 [2022-07-12 10:47:38,880 INFO L226 Difference]: Without dead ends: 136 [2022-07-12 10:47:38,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:47:38,882 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:38,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 627 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:47:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-12 10:47:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-12 10:47:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 10:47:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2022-07-12 10:47:38,895 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 60 [2022-07-12 10:47:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:38,896 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2022-07-12 10:47:38,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-12 10:47:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2022-07-12 10:47:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 10:47:38,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:38,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:38,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-12 10:47:39,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1800290847, now seen corresponding path program 1 times [2022-07-12 10:47:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24662011] [2022-07-12 10:47:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:39,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:39,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352688071] [2022-07-12 10:47:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:39,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:39,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:39,201 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) [2022-07-12 10:47:39,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:47:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 10:47:39,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:39,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:47:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24662011] [2022-07-12 10:47:39,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352688071] [2022-07-12 10:47:39,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352688071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:47:39,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:47:39,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:47:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923634327] [2022-07-12 10:47:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:47:39,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:47:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:47:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:47:39,664 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 10:47:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:39,695 INFO L93 Difference]: Finished difference Result 258 states and 318 transitions. [2022-07-12 10:47:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:47:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-07-12 10:47:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:39,702 INFO L225 Difference]: With dead ends: 258 [2022-07-12 10:47:39,704 INFO L226 Difference]: Without dead ends: 136 [2022-07-12 10:47:39,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:47:39,709 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:39,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 481 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:47:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-12 10:47:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-12 10:47:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 85 states have (on average 1.188235294117647) internal successors, (101), 88 states have internal predecessors, (101), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 10:47:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2022-07-12 10:47:39,730 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 60 [2022-07-12 10:47:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:39,732 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2022-07-12 10:47:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 10:47:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2022-07-12 10:47:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 10:47:39,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:39,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:39,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:39,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 169080727, now seen corresponding path program 1 times [2022-07-12 10:47:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:39,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6336656] [2022-07-12 10:47:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:40,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136964307] [2022-07-12 10:47:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:40,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:40,038 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) [2022-07-12 10:47:40,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:47:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:47:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 2025 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:47:40,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:40,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:47:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6336656] [2022-07-12 10:47:40,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136964307] [2022-07-12 10:47:40,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136964307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:47:40,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:47:40,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:47:40,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812965672] [2022-07-12 10:47:40,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:47:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:47:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:40,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:47:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:47:40,574 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 10:47:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:40,665 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-12 10:47:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:47:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 61 [2022-07-12 10:47:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:40,668 INFO L225 Difference]: With dead ends: 263 [2022-07-12 10:47:40,668 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 10:47:40,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:47:40,670 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 11 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:40,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 484 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:47:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 10:47:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-12 10:47:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 91 states have internal predecessors, (104), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 10:47:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 172 transitions. [2022-07-12 10:47:40,680 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 172 transitions. Word has length 61 [2022-07-12 10:47:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:40,680 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 172 transitions. [2022-07-12 10:47:40,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 10:47:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 172 transitions. [2022-07-12 10:47:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 10:47:40,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:40,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-12 10:47:40,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:40,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:40,908 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -909385697, now seen corresponding path program 2 times [2022-07-12 10:47:40,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:40,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390353025] [2022-07-12 10:47:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:40,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:40,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843676497] [2022-07-12 10:47:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:47:40,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:40,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:40,981 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) [2022-07-12 10:47:40,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:47:43,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:47:43,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:47:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:47:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:43,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:47:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:43,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390353025] [2022-07-12 10:47:43,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:43,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843676497] [2022-07-12 10:47:43,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843676497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:47:43,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:47:43,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-12 10:47:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597098503] [2022-07-12 10:47:43,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:47:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:47:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:47:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:47:43,570 INFO L87 Difference]: Start difference. First operand 139 states and 172 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 10:47:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:44,512 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2022-07-12 10:47:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:47:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 64 [2022-07-12 10:47:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:44,514 INFO L225 Difference]: With dead ends: 269 [2022-07-12 10:47:44,514 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 10:47:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:47:44,516 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 25 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1585 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 10:47:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 10:47:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-12 10:47:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 97 states have internal predecessors, (110), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 10:47:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2022-07-12 10:47:44,526 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 64 [2022-07-12 10:47:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:44,526 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2022-07-12 10:47:44,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 10:47:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2022-07-12 10:47:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 10:47:44,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:44,528 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:44,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:44,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash -555602657, now seen corresponding path program 3 times [2022-07-12 10:47:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729311517] [2022-07-12 10:47:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:44,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:44,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793328574] [2022-07-12 10:47:44,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:47:44,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:44,827 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) [2022-07-12 10:47:44,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:47:52,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 10:47:52,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:47:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 10:47:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:52,393 INFO L390 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 [2022-07-12 10:47:52,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:47:52,764 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:47:52,765 INFO L390 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 [2022-07-12 10:47:52,840 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:47:52,841 INFO L390 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 11 treesize of output 11 [2022-07-12 10:47:52,892 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_604 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_604) |c_#memory_int|)) is different from true [2022-07-12 10:47:52,903 INFO L390 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 16 treesize of output 18 [2022-07-12 10:47:52,933 INFO L390 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 39 treesize of output 21 [2022-07-12 10:47:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:52,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:47:53,012 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_610 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_610) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-12 10:47:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729311517] [2022-07-12 10:47:53,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793328574] [2022-07-12 10:47:53,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793328574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:47:53,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:47:53,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 10:47:53,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322436969] [2022-07-12 10:47:53,015 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 10:47:53,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:47:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:53,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:47:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=443, Unknown=2, NotChecked=86, Total=600 [2022-07-12 10:47:53,017 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:47:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:53,689 INFO L93 Difference]: Finished difference Result 277 states and 360 transitions. [2022-07-12 10:47:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:47:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 70 [2022-07-12 10:47:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:53,692 INFO L225 Difference]: With dead ends: 277 [2022-07-12 10:47:53,692 INFO L226 Difference]: Without dead ends: 218 [2022-07-12 10:47:53,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=714, Unknown=2, NotChecked=110, Total=930 [2022-07-12 10:47:53,694 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 97 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1265 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:53,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 985 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 708 Invalid, 0 Unknown, 1265 Unchecked, 0.5s Time] [2022-07-12 10:47:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-12 10:47:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 164. [2022-07-12 10:47:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 112 states have internal predecessors, (128), 36 states have call successors, (36), 17 states have call predecessors, (36), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-12 10:47:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2022-07-12 10:47:53,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 70 [2022-07-12 10:47:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:53,715 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2022-07-12 10:47:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:47:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2022-07-12 10:47:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 10:47:53,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:53,721 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:53,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:53,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 150826135, now seen corresponding path program 4 times [2022-07-12 10:47:53,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:53,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870176724] [2022-07-12 10:47:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:53,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:54,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:54,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344284934] [2022-07-12 10:47:54,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:47:54,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:54,016 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) [2022-07-12 10:47:54,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:47:54,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:47:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:47:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2215 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 10:47:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:47:54,412 INFO L390 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 [2022-07-12 10:47:54,750 INFO L390 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 14 treesize of output 10 [2022-07-12 10:47:54,793 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:47:54,794 INFO L390 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 [2022-07-12 10:47:54,832 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:47:54,832 INFO L390 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 [2022-07-12 10:47:54,913 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:47:54,914 INFO L390 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 11 treesize of output 11 [2022-07-12 10:47:54,979 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_852 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_852) |c_#memory_int|)) is different from true [2022-07-12 10:47:54,988 INFO L390 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 16 treesize of output 18 [2022-07-12 10:47:55,026 INFO L390 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 33 treesize of output 21 [2022-07-12 10:47:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:47:55,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:47:55,099 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_858) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-12 10:47:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:47:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870176724] [2022-07-12 10:47:55,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:47:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344284934] [2022-07-12 10:47:55,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344284934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:47:55,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:47:55,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-12 10:47:55,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443522068] [2022-07-12 10:47:55,101 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 10:47:55,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:47:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:47:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:47:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=485, Unknown=2, NotChecked=90, Total=650 [2022-07-12 10:47:55,102 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:47:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:47:55,800 INFO L93 Difference]: Finished difference Result 294 states and 384 transitions. [2022-07-12 10:47:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:47:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2022-07-12 10:47:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:47:55,802 INFO L225 Difference]: With dead ends: 294 [2022-07-12 10:47:55,802 INFO L226 Difference]: Without dead ends: 235 [2022-07-12 10:47:55,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=768, Unknown=2, NotChecked=114, Total=992 [2022-07-12 10:47:55,804 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 101 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 10:47:55,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 991 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 828 Invalid, 0 Unknown, 1427 Unchecked, 0.6s Time] [2022-07-12 10:47:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-12 10:47:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 165. [2022-07-12 10:47:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 113 states have internal predecessors, (130), 36 states have call successors, (36), 17 states have call predecessors, (36), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-07-12 10:47:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2022-07-12 10:47:55,816 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 71 [2022-07-12 10:47:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:47:55,817 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2022-07-12 10:47:55,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:47:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2022-07-12 10:47:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 10:47:55,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:47:55,818 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:47:55,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:47:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:56,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:47:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:47:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 575282207, now seen corresponding path program 5 times [2022-07-12 10:47:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:47:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005871759] [2022-07-12 10:47:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:47:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:47:56,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:47:56,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480078912] [2022-07-12 10:47:56,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:47:56,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:47:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:47:56,117 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) [2022-07-12 10:47:56,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:48:04,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 10:48:04,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:48:04,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-12 10:48:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:04,196 INFO L390 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 [2022-07-12 10:48:04,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:48:04,533 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:04,533 INFO L390 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 [2022-07-12 10:48:04,579 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:04,579 INFO L390 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 [2022-07-12 10:48:04,623 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:04,623 INFO L390 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 [2022-07-12 10:48:04,711 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:48:04,711 INFO L390 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 11 treesize of output 11 [2022-07-12 10:48:04,775 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1118 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1118) |c_#memory_int|)) is different from true [2022-07-12 10:48:04,785 INFO L390 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 16 treesize of output 18 [2022-07-12 10:48:04,824 INFO L390 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 33 treesize of output 21 [2022-07-12 10:48:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:04,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:48:04,916 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1124 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_dynamic_~#allocation_size~0#1.base| v_ArrVal_1124) |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base|) (+ |c_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset| 8)) 18446744073709551616) 0)) is different from false [2022-07-12 10:48:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005871759] [2022-07-12 10:48:04,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:48:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480078912] [2022-07-12 10:48:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480078912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:04,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:48:04,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-12 10:48:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692804032] [2022-07-12 10:48:04,918 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 10:48:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 10:48:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 10:48:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=526, Unknown=2, NotChecked=94, Total=702 [2022-07-12 10:48:04,919 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:48:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:05,451 INFO L93 Difference]: Finished difference Result 279 states and 361 transitions. [2022-07-12 10:48:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:48:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2022-07-12 10:48:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:05,453 INFO L225 Difference]: With dead ends: 279 [2022-07-12 10:48:05,453 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 10:48:05,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=766, Unknown=2, NotChecked=114, Total=992 [2022-07-12 10:48:05,455 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 105 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:05,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 551 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 655 Invalid, 0 Unknown, 687 Unchecked, 0.4s Time] [2022-07-12 10:48:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 10:48:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 154. [2022-07-12 10:48:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 104 states have internal predecessors, (117), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 10:48:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-07-12 10:48:05,466 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 72 [2022-07-12 10:48:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:05,467 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-07-12 10:48:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-12 10:48:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-07-12 10:48:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 10:48:05,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:05,468 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:48:05,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:48:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-12 10:48:05,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1655426551, now seen corresponding path program 1 times [2022-07-12 10:48:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:05,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80984942] [2022-07-12 10:48:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:05,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:48:05,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731363217] [2022-07-12 10:48:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:05,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:05,737 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) [2022-07-12 10:48:05,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:48:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:48:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 10:48:06,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:48:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80984942] [2022-07-12 10:48:06,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:48:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731363217] [2022-07-12 10:48:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731363217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:48:06,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:48:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:48:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933653427] [2022-07-12 10:48:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:48:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:48:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:48:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:48:06,126 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-12 10:48:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:06,152 INFO L93 Difference]: Finished difference Result 216 states and 262 transitions. [2022-07-12 10:48:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:48:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2022-07-12 10:48:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:06,153 INFO L225 Difference]: With dead ends: 216 [2022-07-12 10:48:06,153 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 10:48:06,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:48:06,154 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:06,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 633 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 10:48:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 10:48:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-07-12 10:48:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 108 states have internal predecessors, (121), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-12 10:48:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 191 transitions. [2022-07-12 10:48:06,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 191 transitions. Word has length 73 [2022-07-12 10:48:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:06,164 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 191 transitions. [2022-07-12 10:48:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-12 10:48:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 191 transitions. [2022-07-12 10:48:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 10:48:06,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:06,166 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:48:06,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:48:06,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:06,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -209615541, now seen corresponding path program 1 times [2022-07-12 10:48:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:06,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629665464] [2022-07-12 10:48:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 10:48:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 10:48:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 10:48:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629665464] [2022-07-12 10:48:06,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629665464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:48:06,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:48:06,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:48:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185247734] [2022-07-12 10:48:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:48:06,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:48:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:48:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:48:06,737 INFO L87 Difference]: Start difference. First operand 159 states and 191 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:48:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:07,304 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2022-07-12 10:48:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:48:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 79 [2022-07-12 10:48:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:07,307 INFO L225 Difference]: With dead ends: 196 [2022-07-12 10:48:07,307 INFO L226 Difference]: Without dead ends: 194 [2022-07-12 10:48:07,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:48:07,308 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 243 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:07,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 577 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 10:48:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-12 10:48:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2022-07-12 10:48:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 109 states have (on average 1.146788990825688) internal successors, (125), 113 states have internal predecessors, (125), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-12 10:48:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2022-07-12 10:48:07,320 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 79 [2022-07-12 10:48:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:07,320 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2022-07-12 10:48:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 10:48:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2022-07-12 10:48:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 10:48:07,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:07,321 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:48:07,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:48:07,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1358446658, now seen corresponding path program 1 times [2022-07-12 10:48:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:07,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826990077] [2022-07-12 10:48:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 10:48:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 10:48:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:07,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:07,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826990077] [2022-07-12 10:48:07,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826990077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:07,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71053020] [2022-07-12 10:48:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:07,928 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) [2022-07-12 10:48:07,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:48:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-12 10:48:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:08,620 INFO L390 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 14 treesize of output 10 [2022-07-12 10:48:08,658 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:48:08,658 INFO L390 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 25 treesize of output 24 [2022-07-12 10:48:08,704 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:08,705 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:08,770 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:08,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:08,850 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:08,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:08,963 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:08,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:09,064 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:09,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:09,188 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-12 10:48:09,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-12 10:48:09,320 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-12 10:48:09,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-12 10:48:09,462 INFO L356 Elim1Store]: treesize reduction 384, result has 13.7 percent of original size [2022-07-12 10:48:09,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2022-07-12 10:48:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 10:48:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:48:17,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71053020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:17,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:48:17,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 39 [2022-07-12 10:48:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408655156] [2022-07-12 10:48:17,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:48:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 10:48:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 10:48:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1777, Unknown=3, NotChecked=0, Total=1892 [2022-07-12 10:48:17,151 INFO L87 Difference]: Start difference. First operand 166 states and 199 transitions. Second operand has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:20,804 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2022-07-12 10:48:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:48:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 79 [2022-07-12 10:48:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:20,807 INFO L225 Difference]: With dead ends: 333 [2022-07-12 10:48:20,807 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 10:48:20,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=338, Invalid=4081, Unknown=3, NotChecked=0, Total=4422 [2022-07-12 10:48:20,809 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 354 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:20,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1852 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 3174 Invalid, 0 Unknown, 902 Unchecked, 2.4s Time] [2022-07-12 10:48:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 10:48:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2022-07-12 10:48:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 114 states have internal predecessors, (126), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-12 10:48:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2022-07-12 10:48:20,822 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 79 [2022-07-12 10:48:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:20,823 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2022-07-12 10:48:20,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 34 states have internal predecessors, (80), 6 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2022-07-12 10:48:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 10:48:20,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:20,824 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:48:20,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:48:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 10:48:21,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -360650806, now seen corresponding path program 2 times [2022-07-12 10:48:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607085880] [2022-07-12 10:48:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 10:48:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 10:48:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:21,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607085880] [2022-07-12 10:48:21,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607085880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329022142] [2022-07-12 10:48:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:48:21,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:21,736 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) [2022-07-12 10:48:21,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:48:22,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:48:22,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:48:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 10:48:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:22,428 INFO L390 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 14 treesize of output 10 [2022-07-12 10:48:22,468 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:48:22,468 INFO L390 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 25 treesize of output 24 [2022-07-12 10:48:22,523 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:22,524 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:22,597 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:22,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:22,692 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:22,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:22,816 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-12 10:48:22,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-12 10:48:22,959 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-12 10:48:22,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-12 10:48:23,148 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-12 10:48:23,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-12 10:48:23,350 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-12 10:48:23,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-12 10:48:23,607 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-12 10:48:23,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-12 10:48:23,910 INFO L356 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2022-07-12 10:48:23,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-12 10:48:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:48:27,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329022142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:27,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:48:27,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-07-12 10:48:27,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057530865] [2022-07-12 10:48:27,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:48:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 10:48:27,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 10:48:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1531, Unknown=1, NotChecked=0, Total=1640 [2022-07-12 10:48:27,957 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 10:48:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:31,182 INFO L93 Difference]: Finished difference Result 332 states and 402 transitions. [2022-07-12 10:48:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:48:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 80 [2022-07-12 10:48:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:31,183 INFO L225 Difference]: With dead ends: 332 [2022-07-12 10:48:31,183 INFO L226 Difference]: Without dead ends: 196 [2022-07-12 10:48:31,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=230, Invalid=2961, Unknown=1, NotChecked=0, Total=3192 [2022-07-12 10:48:31,185 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 146 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:31,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1657 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2029 Invalid, 0 Unknown, 549 Unchecked, 2.2s Time] [2022-07-12 10:48:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-12 10:48:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2022-07-12 10:48:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 115 states have internal predecessors, (127), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (38), 34 states have call predecessors, (38), 34 states have call successors, (38) [2022-07-12 10:48:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2022-07-12 10:48:31,200 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 80 [2022-07-12 10:48:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:31,200 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2022-07-12 10:48:31,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 10:48:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2022-07-12 10:48:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 10:48:31,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:31,202 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:48:31,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 10:48:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 10:48:31,423 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2113064638, now seen corresponding path program 3 times [2022-07-12 10:48:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066548516] [2022-07-12 10:48:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:31,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-12 10:48:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-12 10:48:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066548516] [2022-07-12 10:48:32,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066548516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505135595] [2022-07-12 10:48:32,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:48:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:32,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:32,084 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) [2022-07-12 10:48:32,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:48:37,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 10:48:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:48:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2224 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 10:48:37,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:37,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:48:37,628 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:37,629 INFO L390 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 [2022-07-12 10:48:37,695 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:37,695 INFO L390 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 [2022-07-12 10:48:37,768 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:37,769 INFO L390 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 [2022-07-12 10:48:37,855 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:37,855 INFO L390 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 [2022-07-12 10:48:37,938 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:37,938 INFO L390 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 [2022-07-12 10:48:38,011 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:38,011 INFO L390 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 [2022-07-12 10:48:38,108 INFO L356 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2022-07-12 10:48:38,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-12 10:48:38,185 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-12 10:48:38,186 INFO L390 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 [2022-07-12 10:48:38,305 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-12 10:48:38,305 INFO L390 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 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-12 10:48:38,516 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-12 10:48:38,516 INFO L390 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 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-12 10:48:38,811 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-12 10:48:38,811 INFO L390 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 3 case distinctions, treesize of input 32 treesize of output 34 [2022-07-12 10:48:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 10:48:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:48:39,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505135595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:39,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:48:39,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-07-12 10:48:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776536406] [2022-07-12 10:48:39,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:48:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 10:48:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:39,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 10:48:39,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1581, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 10:48:39,986 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:41,322 INFO L93 Difference]: Finished difference Result 356 states and 432 transitions. [2022-07-12 10:48:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:48:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 81 [2022-07-12 10:48:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:41,325 INFO L225 Difference]: With dead ends: 356 [2022-07-12 10:48:41,325 INFO L226 Difference]: Without dead ends: 218 [2022-07-12 10:48:41,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=313, Invalid=3227, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 10:48:41,327 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 262 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:41,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1373 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 760 Invalid, 0 Unknown, 596 Unchecked, 0.5s Time] [2022-07-12 10:48:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-12 10:48:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2022-07-12 10:48:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 128 states have internal predecessors, (144), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-12 10:48:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2022-07-12 10:48:41,346 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 81 [2022-07-12 10:48:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:41,347 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2022-07-12 10:48:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 32 states have internal predecessors, (78), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2022-07-12 10:48:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 10:48:41,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:41,348 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 5, 5, 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] [2022-07-12 10:48:41,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:48:41,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:48:41,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash -780390283, now seen corresponding path program 1 times [2022-07-12 10:48:41,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:41,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586724437] [2022-07-12 10:48:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:41,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:41,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:48:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149205304] [2022-07-12 10:48:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:41,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:41,617 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) [2022-07-12 10:48:41,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:48:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2291 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:48:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-12 10:48:42,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:48:42,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:42,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586724437] [2022-07-12 10:48:42,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:48:42,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149205304] [2022-07-12 10:48:42,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149205304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:48:42,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:48:42,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:48:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231450721] [2022-07-12 10:48:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:48:42,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:48:42,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:48:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:48:42,088 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-12 10:48:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:42,295 INFO L93 Difference]: Finished difference Result 246 states and 298 transitions. [2022-07-12 10:48:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:48:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2022-07-12 10:48:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:42,296 INFO L225 Difference]: With dead ends: 246 [2022-07-12 10:48:42,296 INFO L226 Difference]: Without dead ends: 186 [2022-07-12 10:48:42,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:48:42,297 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 192 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:42,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 547 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 10:48:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-12 10:48:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-12 10:48:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.153225806451613) internal successors, (143), 128 states have internal predecessors, (143), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-12 10:48:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2022-07-12 10:48:42,316 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 84 [2022-07-12 10:48:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:42,316 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2022-07-12 10:48:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-12 10:48:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2022-07-12 10:48:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 10:48:42,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:42,318 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 5, 5, 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] [2022-07-12 10:48:42,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 10:48:42,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 10:48:42,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash -699058586, now seen corresponding path program 1 times [2022-07-12 10:48:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:42,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400454086] [2022-07-12 10:48:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-12 10:48:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-12 10:48:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 10:48:43,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400454086] [2022-07-12 10:48:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400454086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451889463] [2022-07-12 10:48:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:43,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:43,295 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) [2022-07-12 10:48:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:48:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2250 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-12 10:48:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:43,951 INFO L390 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 14 treesize of output 10 [2022-07-12 10:48:44,002 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:48:44,002 INFO L390 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 25 treesize of output 24 [2022-07-12 10:48:44,069 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:44,070 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:44,139 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:44,139 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:44,227 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:44,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:44,322 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:44,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:44,457 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:44,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:44,607 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-12 10:48:44,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-12 10:48:44,813 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-12 10:48:44,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-12 10:48:45,074 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-12 10:48:45,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-12 10:48:45,364 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-12 10:48:45,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-12 10:48:45,723 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-12 10:48:45,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-12 10:48:46,158 INFO L356 Elim1Store]: treesize reduction 920, result has 9.9 percent of original size [2022-07-12 10:48:46,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-12 10:48:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:48:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:48:48,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451889463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:48,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:48:48,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 43 [2022-07-12 10:48:48,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548889682] [2022-07-12 10:48:48,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:48:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 10:48:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:48:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 10:48:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 10:48:48,795 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:48:53,774 INFO L93 Difference]: Finished difference Result 369 states and 448 transitions. [2022-07-12 10:48:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 10:48:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 85 [2022-07-12 10:48:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:48:53,776 INFO L225 Difference]: With dead ends: 369 [2022-07-12 10:48:53,776 INFO L226 Difference]: Without dead ends: 216 [2022-07-12 10:48:53,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=274, Invalid=4282, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 10:48:53,778 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 259 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-12 10:48:53,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1478 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2461 Invalid, 0 Unknown, 612 Unchecked, 3.3s Time] [2022-07-12 10:48:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-12 10:48:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 187. [2022-07-12 10:48:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.152) internal successors, (144), 129 states have internal predecessors, (144), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (42), 36 states have call predecessors, (42), 37 states have call successors, (42) [2022-07-12 10:48:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2022-07-12 10:48:53,796 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 85 [2022-07-12 10:48:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:48:53,796 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2022-07-12 10:48:53,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 38 states have internal predecessors, (87), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:48:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2022-07-12 10:48:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-12 10:48:53,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:48:53,797 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 5, 5, 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] [2022-07-12 10:48:53,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:48:54,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:54,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:48:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:48:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1960056814, now seen corresponding path program 2 times [2022-07-12 10:48:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:48:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622919027] [2022-07-12 10:48:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:48:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:48:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:48:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:48:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:48:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:48:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:48:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:48:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:48:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 10:48:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:48:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:48:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 10:48:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:48:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 10:48:54,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:48:54,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622919027] [2022-07-12 10:48:54,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622919027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:48:54,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574329508] [2022-07-12 10:48:54,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:48:54,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:48:54,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:48:54,830 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) [2022-07-12 10:48:54,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:48:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:48:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:48:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2269 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-12 10:48:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:48:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:48:55,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:48:55,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:48:55,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-07-12 10:48:55,767 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:48:55,768 INFO L390 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 7 [2022-07-12 10:48:56,224 INFO L356 Elim1Store]: treesize reduction 152, result has 50.2 percent of original size [2022-07-12 10:48:56,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 39 select indices, 39 select index equivalence classes, 703 disjoint index pairs (out of 741 index pairs), introduced 39 new quantified variables, introduced 38 case distinctions, treesize of input 196 treesize of output 270 [2022-07-12 10:48:57,897 INFO L390 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 14 treesize of output 10 [2022-07-12 10:48:57,960 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:48:57,960 INFO L390 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 25 treesize of output 24 [2022-07-12 10:48:58,055 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:58,055 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:58,154 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:58,154 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:58,249 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:58,249 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:58,355 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:58,356 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:58,456 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:48:58,456 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:48:58,592 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:58,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:58,736 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:58,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:58,881 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:58,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:59,029 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:48:59,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:48:59,185 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:59,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:59,348 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:48:59,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:48:59,516 INFO L356 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2022-07-12 10:48:59,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2022-07-12 10:49:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:49:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:49:08,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574329508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:49:08,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:49:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 50 [2022-07-12 10:49:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912169608] [2022-07-12 10:49:08,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:49:08,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 10:49:08,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:49:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 10:49:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2928, Unknown=2, NotChecked=0, Total=3080 [2022-07-12 10:49:08,351 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-12 10:49:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:49:19,518 INFO L93 Difference]: Finished difference Result 421 states and 506 transitions. [2022-07-12 10:49:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 10:49:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 86 [2022-07-12 10:49:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:49:19,520 INFO L225 Difference]: With dead ends: 421 [2022-07-12 10:49:19,520 INFO L226 Difference]: Without dead ends: 268 [2022-07-12 10:49:19,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=464, Invalid=7016, Unknown=2, NotChecked=0, Total=7482 [2022-07-12 10:49:19,523 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 358 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 6194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-12 10:49:19,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 2830 Invalid, 6194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 4919 Invalid, 0 Unknown, 969 Unchecked, 4.7s Time] [2022-07-12 10:49:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-12 10:49:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 216. [2022-07-12 10:49:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 151 states have internal predecessors, (169), 42 states have call successors, (42), 26 states have call predecessors, (42), 27 states have return successors, (44), 38 states have call predecessors, (44), 40 states have call successors, (44) [2022-07-12 10:49:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 255 transitions. [2022-07-12 10:49:19,558 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 255 transitions. Word has length 86 [2022-07-12 10:49:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:49:19,559 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 255 transitions. [2022-07-12 10:49:19,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.9375) internal successors, (93), 43 states have internal predecessors, (93), 7 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-12 10:49:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 255 transitions. [2022-07-12 10:49:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-12 10:49:19,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:49:19,560 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 5, 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] [2022-07-12 10:49:19,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:49:19,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:49:19,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:49:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:49:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1506711706, now seen corresponding path program 3 times [2022-07-12 10:49:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:49:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264686569] [2022-07-12 10:49:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:49:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:49:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:49:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:49:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:49:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:49:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:49:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:49:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:19,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:49:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:20,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 10:49:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:49:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:49:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-12 10:49:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:49:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 10:49:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:49:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264686569] [2022-07-12 10:49:20,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264686569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:49:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590895899] [2022-07-12 10:49:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:49:20,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:49:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:49:20,764 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) [2022-07-12 10:49:20,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:50:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 10:50:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:50:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-12 10:50:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:50:32,746 INFO L390 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 14 treesize of output 10 [2022-07-12 10:50:32,811 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:50:32,811 INFO L390 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 25 treesize of output 24 [2022-07-12 10:50:32,922 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:50:32,922 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:50:33,039 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:50:33,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:50:33,215 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:50:33,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:50:33,371 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-12 10:50:33,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-12 10:50:33,667 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-12 10:50:33,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-12 10:50:34,046 INFO L356 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2022-07-12 10:50:34,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2022-07-12 10:50:34,514 INFO L356 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2022-07-12 10:50:34,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2022-07-12 10:50:35,081 INFO L356 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2022-07-12 10:50:35,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2022-07-12 10:50:35,751 INFO L356 Elim1Store]: treesize reduction 940, result has 9.7 percent of original size [2022-07-12 10:50:35,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2022-07-12 10:50:36,653 INFO L356 Elim1Store]: treesize reduction 1111, result has 9.1 percent of original size [2022-07-12 10:50:36,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 125 treesize of output 154 [2022-07-12 10:50:37,395 INFO L356 Elim1Store]: treesize reduction 1296, result has 8.5 percent of original size [2022-07-12 10:50:37,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2022-07-12 10:50:38,437 INFO L356 Elim1Store]: treesize reduction 1495, result has 8.1 percent of original size [2022-07-12 10:50:38,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 180 [2022-07-12 10:50:39,526 INFO L356 Elim1Store]: treesize reduction 2464, result has 6.9 percent of original size [2022-07-12 10:50:39,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 200 treesize of output 238 [2022-07-12 10:50:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:50:42,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:50:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590895899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:50:43,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:50:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 48 [2022-07-12 10:50:43,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980594243] [2022-07-12 10:50:43,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:50:43,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 10:50:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:50:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 10:50:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2789, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 10:50:43,946 INFO L87 Difference]: Start difference. First operand 216 states and 255 transitions. Second operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:50:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 10:50:52,691 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2022-07-12 10:50:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:50:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-07-12 10:50:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 10:50:52,693 INFO L225 Difference]: With dead ends: 430 [2022-07-12 10:50:52,693 INFO L226 Difference]: Without dead ends: 249 [2022-07-12 10:50:52,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=339, Invalid=5361, Unknown=0, NotChecked=0, Total=5700 [2022-07-12 10:50:52,695 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 337 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 3974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-12 10:50:52,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 2106 Invalid, 3974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3109 Invalid, 0 Unknown, 548 Unchecked, 5.1s Time] [2022-07-12 10:50:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-12 10:50:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 217. [2022-07-12 10:50:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.1564625850340136) internal successors, (170), 152 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 27 states have return successors, (44), 38 states have call predecessors, (44), 40 states have call successors, (44) [2022-07-12 10:50:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2022-07-12 10:50:52,725 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 87 [2022-07-12 10:50:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 10:50:52,725 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2022-07-12 10:50:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (23), 8 states have call predecessors, (23), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-12 10:50:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2022-07-12 10:50:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 10:50:52,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 10:50:52,726 INFO L195 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 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] [2022-07-12 10:50:52,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:50:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:50:52,949 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:50:52,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:50:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1602353426, now seen corresponding path program 4 times [2022-07-12 10:50:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:50:52,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181860709] [2022-07-12 10:50:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:50:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:50:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 10:50:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 10:50:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 10:50:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 10:50:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 10:50:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 10:50:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 10:50:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-12 10:50:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:53,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 10:50:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 10:50:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:54,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-12 10:50:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:50:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 10:50:54,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:50:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181860709] [2022-07-12 10:50:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181860709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:50:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147178833] [2022-07-12 10:50:54,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:50:54,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:50:54,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:50:54,034 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) [2022-07-12 10:50:54,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:50:54,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:50:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:50:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-12 10:50:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:50:54,797 INFO L390 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 14 treesize of output 10 [2022-07-12 10:50:54,869 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-07-12 10:50:54,869 INFO L390 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 25 treesize of output 24 [2022-07-12 10:50:54,983 INFO L356 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2022-07-12 10:50:54,983 INFO L390 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 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-12 10:50:55,151 INFO L356 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2022-07-12 10:50:55,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2022-07-12 10:50:55,386 INFO L356 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2022-07-12 10:50:55,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:50:55,707 INFO L356 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2022-07-12 10:50:55,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2022-07-12 10:50:56,130 INFO L356 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2022-07-12 10:50:56,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2022-07-12 10:50:56,730 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-12 10:50:56,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-12 10:50:57,020 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-12 10:50:57,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-12 10:50:57,539 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-12 10:50:57,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-12 10:50:58,090 INFO L356 Elim1Store]: treesize reduction 497, result has 12.5 percent of original size [2022-07-12 10:50:58,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 101 [2022-07-12 10:50:58,470 INFO L356 Elim1Store]: treesize reduction 630, result has 11.3 percent of original size [2022-07-12 10:50:58,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 114 [2022-07-12 10:50:59,065 INFO L356 Elim1Store]: treesize reduction 772, result has 10.4 percent of original size [2022-07-12 10:50:59,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2022-07-12 10:50:59,750 INFO L356 Elim1Store]: treesize reduction 928, result has 9.7 percent of original size [2022-07-12 10:50:59,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 114 treesize of output 140 [2022-07-12 10:51:00,449 INFO L356 Elim1Store]: treesize reduction 1076, result has 9.3 percent of original size [2022-07-12 10:51:00,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2022-07-12 10:51:01,149 INFO L356 Elim1Store]: treesize reduction 1076, result has 9.3 percent of original size [2022-07-12 10:51:01,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 152 [2022-07-12 10:51:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 10:51:27,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:51:29,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147178833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:51:29,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:51:29,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2022-07-12 10:51:29,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275382398] [2022-07-12 10:51:29,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:51:29,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 10:51:29,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:51:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 10:51:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2580, Unknown=9, NotChecked=0, Total=2756 [2022-07-12 10:51:29,422 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 42 states have internal predecessors, (90), 4 states have call successors, (17), 8 states have call predecessors, (17), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)