./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_linked_list_init_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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 22:26:38,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:26:38,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:26:38,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:26:38,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:26:38,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:26:38,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:26:38,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:26:38,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:26:38,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:26:38,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:26:38,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:26:38,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:26:38,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:26:38,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:26:38,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:26:38,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:26:38,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:26:38,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:26:38,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:26:38,620 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:26:38,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:26:38,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:26:38,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:26:38,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:26:38,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:26:38,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:26:38,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:26:38,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:26:38,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:26:38,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:26:38,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:26:38,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:26:38,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:26:38,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:26:38,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:26:38,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:26:38,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:26:38,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:26:38,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:26:38,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:26:38,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:26:38,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 22:26:38,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:26:38,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:26:38,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:26:38,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:26:38,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:26:38,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:26:38,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:26:38,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:26:38,650 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:26:38,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:26:38,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:26:38,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:26:38,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:26:38,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:26:38,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:26:38,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:26:38,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:26:38,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:26:38,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:26:38,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:26:38,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:26:38,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:26:38,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:26:38,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:26:38,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:26:38,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:26:38,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:26:38,654 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:26:38,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:26:38,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:26:38,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2022-07-22 22:26:38,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:26:38,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:26:38,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:26:38,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:26:38,825 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:26:38,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-07-22 22:26:38,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc3b22fd/ed5c484d53e74f35b05bfac486e61bc2/FLAG0e9b4ea90 [2022-07-22 22:26:39,435 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:26:39,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-07-22 22:26:39,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc3b22fd/ed5c484d53e74f35b05bfac486e61bc2/FLAG0e9b4ea90 [2022-07-22 22:26:39,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc3b22fd/ed5c484d53e74f35b05bfac486e61bc2 [2022-07-22 22:26:39,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:26:39,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:26:39,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:26:39,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:26:39,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:26:39,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:26:39" (1/1) ... [2022-07-22 22:26:39,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72197bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:39, skipping insertion in model container [2022-07-22 22:26:39,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:26:39" (1/1) ... [2022-07-22 22:26:39,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:26:40,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:26:40,192 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_linked_list_init_harness.i[4494,4507] [2022-07-22 22:26:40,196 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_linked_list_init_harness.i[4554,4567] [2022-07-22 22:26:40,586 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,587 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,587 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,588 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,590 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,597 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,605 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,605 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,608 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,608 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,609 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,610 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,771 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:26:40,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:26:40,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:26:40,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:26:40,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:26:40,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:26:40,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:26:40,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:26:40,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:26:40,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:26:40,838 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:26:40,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:26:40,863 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:26:40,871 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_linked_list_init_harness.i[4494,4507] [2022-07-22 22:26:40,871 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_linked_list_init_harness.i[4554,4567] [2022-07-22 22:26:40,916 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,916 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,921 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,921 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,922 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,926 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,926 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,927 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,927 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,928 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,929 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,929 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,929 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:26:40,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:26:40,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:26:40,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:26:40,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:26:40,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:26:40,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:26:40,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:26:40,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:26:40,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:26:40,954 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:26:40,967 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:26:40,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:26:41,070 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:26:41,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41 WrapperNode [2022-07-22 22:26:41,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:26:41,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:26:41,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:26:41,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:26:41,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,177 INFO L137 Inliner]: procedures = 679, calls = 1036, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 93 [2022-07-22 22:26:41,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:26:41,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:26:41,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:26:41,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:26:41,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:26:41,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:26:41,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:26:41,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:26:41,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (1/1) ... [2022-07-22 22:26:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:26:41,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:41,260 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) [2022-07-22 22:26:41,283 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 [2022-07-22 22:26:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-07-22 22:26:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-07-22 22:26:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:26:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 22:26:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 22:26:41,294 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-07-22 22:26:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-07-22 22:26:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-07-22 22:26:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-07-22 22:26:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:26:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 22:26:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:26:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:26:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-07-22 22:26:41,315 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-07-22 22:26:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 22:26:41,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 22:26:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:26:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 22:26:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 22:26:41,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:26:41,507 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:26:41,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:26:41,624 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:26:41,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:26:41,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 22:26:41,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:26:41 BoogieIcfgContainer [2022-07-22 22:26:41,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:26:41,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:26:41,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:26:41,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:26:41,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:26:39" (1/3) ... [2022-07-22 22:26:41,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4696d031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:26:41, skipping insertion in model container [2022-07-22 22:26:41,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:26:41" (2/3) ... [2022-07-22 22:26:41,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4696d031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:26:41, skipping insertion in model container [2022-07-22 22:26:41,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:26:41" (3/3) ... [2022-07-22 22:26:41,636 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2022-07-22 22:26:41,645 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:26:41,645 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:26:41,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:26:41,679 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@47c1ef62, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d4a217a [2022-07-22 22:26:41,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 22:26:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 22:26:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:41,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:41,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:41,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2022-07-22 22:26:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:41,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131978964] [2022-07-22 22:26:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131978964] [2022-07-22 22:26:41,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131978964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:41,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:41,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:26:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098719881] [2022-07-22 22:26:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:41,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:26:41,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:26:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:26:42,010 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:42,035 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-07-22 22:26:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:26:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 22:26:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:42,044 INFO L225 Difference]: With dead ends: 117 [2022-07-22 22:26:42,045 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 22:26:42,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 22:26:42,058 INFO L413 NwaCegarLoop]: 75 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, 75 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 [2022-07-22 22:26:42,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:26:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 22:26:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-22 22:26:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 22:26:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-07-22 22:26:42,104 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2022-07-22 22:26:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:42,104 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-07-22 22:26:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-07-22 22:26:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:42,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:42,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 22:26:42,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2022-07-22 22:26:42,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549767362] [2022-07-22 22:26:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:42,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549767362] [2022-07-22 22:26:42,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549767362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:42,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:42,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 22:26:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851088231] [2022-07-22 22:26:42,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:42,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:26:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:26:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 22:26:42,451 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:42,629 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2022-07-22 22:26:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:26:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 22:26:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:42,634 INFO L225 Difference]: With dead ends: 108 [2022-07-22 22:26:42,634 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 22:26:42,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:26:42,635 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:42,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 320 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 22:26:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-22 22:26:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-22 22:26:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-07-22 22:26:42,651 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 26 [2022-07-22 22:26:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:42,651 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-07-22 22:26:42,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-07-22 22:26:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:42,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:42,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:42,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 22:26:42,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2022-07-22 22:26:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985003156] [2022-07-22 22:26:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:42,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985003156] [2022-07-22 22:26:42,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985003156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:42,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:42,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 22:26:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61752605] [2022-07-22 22:26:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:42,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 22:26:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 22:26:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:26:42,889 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:43,104 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2022-07-22 22:26:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:26:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 22:26:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:43,106 INFO L225 Difference]: With dead ends: 124 [2022-07-22 22:26:43,106 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 22:26:43,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-22 22:26:43,107 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 77 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:43,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 409 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 22:26:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-22 22:26:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-07-22 22:26:43,115 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 26 [2022-07-22 22:26:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:43,115 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-07-22 22:26:43,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-07-22 22:26:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:43,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:43,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:43,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 22:26:43,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2022-07-22 22:26:43,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:43,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802996043] [2022-07-22 22:26:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:43,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802996043] [2022-07-22 22:26:43,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802996043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:43,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:43,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 22:26:43,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407302293] [2022-07-22 22:26:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 22:26:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 22:26:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:26:43,306 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:43,476 INFO L93 Difference]: Finished difference Result 152 states and 207 transitions. [2022-07-22 22:26:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:26:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 22:26:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:43,480 INFO L225 Difference]: With dead ends: 152 [2022-07-22 22:26:43,480 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 22:26:43,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-22 22:26:43,483 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 87 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 375 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 22:26:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2022-07-22 22:26:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 56 states have internal predecessors, (75), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2022-07-22 22:26:43,505 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 26 [2022-07-22 22:26:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:43,505 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2022-07-22 22:26:43,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2022-07-22 22:26:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:43,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:43,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:43,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 22:26:43,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2022-07-22 22:26:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537629897] [2022-07-22 22:26:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:43,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537629897] [2022-07-22 22:26:43,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537629897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:43,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:43,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 22:26:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767483] [2022-07-22 22:26:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 22:26:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 22:26:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:26:43,645 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:43,815 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2022-07-22 22:26:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:26:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 22:26:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:43,818 INFO L225 Difference]: With dead ends: 176 [2022-07-22 22:26:43,818 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 22:26:43,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-22 22:26:43,822 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 75 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:43,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 480 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 22:26:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2022-07-22 22:26:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.396551724137931) internal successors, (81), 60 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-07-22 22:26:43,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 26 [2022-07-22 22:26:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:43,833 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-07-22 22:26:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 22:26:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-07-22 22:26:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 22:26:43,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:43,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:43,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 22:26:43,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2022-07-22 22:26:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:43,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534705296] [2022-07-22 22:26:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:43,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:43,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534705296] [2022-07-22 22:26:43,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534705296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:43,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:43,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 22:26:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692325759] [2022-07-22 22:26:43,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 22:26:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 22:26:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:26:43,906 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:43,949 INFO L93 Difference]: Finished difference Result 173 states and 239 transitions. [2022-07-22 22:26:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:26:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-22 22:26:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:43,950 INFO L225 Difference]: With dead ends: 173 [2022-07-22 22:26:43,950 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 22:26:43,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:26:43,951 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 45 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:43,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 380 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:26:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 22:26:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-07-22 22:26:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 53 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-07-22 22:26:43,955 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 26 [2022-07-22 22:26:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:43,955 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-07-22 22:26:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-07-22 22:26:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 22:26:43,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:43,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:43,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 22:26:43,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2022-07-22 22:26:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954127309] [2022-07-22 22:26:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954127309] [2022-07-22 22:26:44,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954127309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:44,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:44,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 22:26:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81208830] [2022-07-22 22:26:44,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:26:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:26:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:26:44,022 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:44,107 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2022-07-22 22:26:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:26:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-22 22:26:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:44,108 INFO L225 Difference]: With dead ends: 141 [2022-07-22 22:26:44,108 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 22:26:44,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:26:44,109 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:44,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 319 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 22:26:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-07-22 22:26:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-07-22 22:26:44,112 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 28 [2022-07-22 22:26:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:44,112 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-07-22 22:26:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-07-22 22:26:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 22:26:44,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:44,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 22:26:44,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2022-07-22 22:26:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:44,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134469691] [2022-07-22 22:26:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134469691] [2022-07-22 22:26:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134469691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:44,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:44,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 22:26:44,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213035478] [2022-07-22 22:26:44,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:44,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 22:26:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 22:26:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 22:26:44,185 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:44,304 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2022-07-22 22:26:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:26:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-22 22:26:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:44,305 INFO L225 Difference]: With dead ends: 159 [2022-07-22 22:26:44,305 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 22:26:44,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:26:44,306 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:44,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 348 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 22:26:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2022-07-22 22:26:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-07-22 22:26:44,321 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 30 [2022-07-22 22:26:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:44,322 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-07-22 22:26:44,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-07-22 22:26:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 22:26:44,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:44,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:44,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 22:26:44,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2022-07-22 22:26:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:44,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655578948] [2022-07-22 22:26:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:44,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655578948] [2022-07-22 22:26:44,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655578948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:44,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:44,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:26:44,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239750744] [2022-07-22 22:26:44,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:44,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:26:44,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:26:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:26:44,394 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:44,434 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2022-07-22 22:26:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:26:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-07-22 22:26:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:44,435 INFO L225 Difference]: With dead ends: 149 [2022-07-22 22:26:44,436 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 22:26:44,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:26:44,438 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:44,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 276 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:26:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 22:26:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-07-22 22:26:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 22:26:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-07-22 22:26:44,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 31 [2022-07-22 22:26:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:44,444 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-07-22 22:26:44,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 22:26:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-07-22 22:26:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 22:26:44,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:44,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 22:26:44,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2022-07-22 22:26:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:44,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676941447] [2022-07-22 22:26:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676941447] [2022-07-22 22:26:44,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676941447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:44,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:44,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:26:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678200890] [2022-07-22 22:26:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:26:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:26:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:26:44,792 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 22:26:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:45,175 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-07-22 22:26:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 22:26:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-07-22 22:26:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:45,177 INFO L225 Difference]: With dead ends: 164 [2022-07-22 22:26:45,178 INFO L226 Difference]: Without dead ends: 97 [2022-07-22 22:26:45,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-22 22:26:45,178 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 59 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:45,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 482 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:26:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-22 22:26:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2022-07-22 22:26:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.293103448275862) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 22:26:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-22 22:26:45,184 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-07-22 22:26:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:45,184 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-22 22:26:45,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 22:26:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-22 22:26:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 22:26:45,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:45,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:45,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 22:26:45,185 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2022-07-22 22:26:45,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562049717] [2022-07-22 22:26:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:45,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:45,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562049717] [2022-07-22 22:26:45,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562049717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:45,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:45,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-22 22:26:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58645490] [2022-07-22 22:26:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 22:26:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 22:26:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-22 22:26:45,352 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 22:26:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:45,641 INFO L93 Difference]: Finished difference Result 192 states and 261 transitions. [2022-07-22 22:26:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 22:26:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-07-22 22:26:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:45,643 INFO L225 Difference]: With dead ends: 192 [2022-07-22 22:26:45,643 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 22:26:45,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:26:45,644 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:45,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 519 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:26:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 22:26:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2022-07-22 22:26:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-22 22:26:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-22 22:26:45,649 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 39 [2022-07-22 22:26:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:45,650 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-22 22:26:45,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 22:26:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-22 22:26:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 22:26:45,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:45,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:45,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 22:26:45,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2022-07-22 22:26:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:45,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677901442] [2022-07-22 22:26:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:45,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677901442] [2022-07-22 22:26:45,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677901442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:45,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:45,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 22:26:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632864376] [2022-07-22 22:26:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 22:26:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:45,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 22:26:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:26:45,744 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 22:26:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:45,903 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-07-22 22:26:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 22:26:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-22 22:26:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:45,905 INFO L225 Difference]: With dead ends: 201 [2022-07-22 22:26:45,905 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 22:26:45,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:26:45,906 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 64 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:45,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 465 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:26:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 22:26:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-07-22 22:26:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 67 states have internal predecessors, (80), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2022-07-22 22:26:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2022-07-22 22:26:45,912 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 39 [2022-07-22 22:26:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:45,912 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2022-07-22 22:26:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 22:26:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2022-07-22 22:26:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 22:26:45,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:45,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:45,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 22:26:45,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2022-07-22 22:26:45,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:45,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799339570] [2022-07-22 22:26:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:46,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:46,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799339570] [2022-07-22 22:26:46,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799339570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:26:46,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331961969] [2022-07-22 22:26:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:46,046 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) [2022-07-22 22:26:46,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:26:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 22:26:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:26:47,137 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2022-07-22 22:26:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:47,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:26:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:26:47,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331961969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:26:47,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:26:47,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 8] total 27 [2022-07-22 22:26:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899335906] [2022-07-22 22:26:47,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:26:47,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 22:26:47,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 22:26:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=586, Unknown=1, NotChecked=48, Total=702 [2022-07-22 22:26:47,449 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand has 27 states, 24 states have (on average 3.125) internal successors, (75), 25 states have internal predecessors, (75), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 22:26:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:48,234 INFO L93 Difference]: Finished difference Result 233 states and 321 transitions. [2022-07-22 22:26:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 22:26:48,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 25 states have internal predecessors, (75), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 41 [2022-07-22 22:26:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:48,236 INFO L225 Difference]: With dead ends: 233 [2022-07-22 22:26:48,236 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 22:26:48,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1455, Unknown=1, NotChecked=78, Total=1722 [2022-07-22 22:26:48,237 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 204 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:48,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 943 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 928 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-07-22 22:26:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 22:26:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-07-22 22:26:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 82 states have internal predecessors, (100), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2022-07-22 22:26:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2022-07-22 22:26:48,248 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 41 [2022-07-22 22:26:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:48,249 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2022-07-22 22:26:48,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 25 states have internal predecessors, (75), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 22:26:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2022-07-22 22:26:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 22:26:48,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:48,250 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 22:26:48,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 22:26:48,464 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,SelfDestructingSolverStorable12 [2022-07-22 22:26:48,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2022-07-22 22:26:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637251230] [2022-07-22 22:26:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 22:26:48,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:48,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637251230] [2022-07-22 22:26:48,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637251230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:26:48,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:26:48,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 22:26:48,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515168460] [2022-07-22 22:26:48,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:26:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:26:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:26:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:26:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:26:48,543 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 22:26:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:26:48,589 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2022-07-22 22:26:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:26:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-22 22:26:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:26:48,590 INFO L225 Difference]: With dead ends: 118 [2022-07-22 22:26:48,590 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 22:26:48,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:26:48,590 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:26:48,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 452 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:26:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 22:26:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-07-22 22:26:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 89 states have internal predecessors, (106), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-07-22 22:26:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2022-07-22 22:26:48,598 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 42 [2022-07-22 22:26:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:26:48,598 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2022-07-22 22:26:48,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 22:26:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2022-07-22 22:26:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 22:26:48,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:26:48,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:26:48,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 22:26:48,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:26:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:26:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2022-07-22 22:26:48,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:26:48,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383282627] [2022-07-22 22:26:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:48,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:26:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:26:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:26:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:26:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:26:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:26:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:26:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383282627] [2022-07-22 22:26:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383282627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:26:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918952302] [2022-07-22 22:26:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:26:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:26:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:26:48,797 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) [2022-07-22 22:26:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:26:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:26:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 22:26:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:26:48,946 INFO L356 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2022-07-22 22:26:48,946 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 3 case distinctions, treesize of input 26 treesize of output 35 [2022-07-22 22:26:48,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:26:48,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-07-22 22:27:25,098 WARN L233 SmtUtils]: Spent 11.47s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:27:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 22:27:27,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:27:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 22:27:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918952302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:27:27,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:27:27,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2022-07-22 22:27:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485063056] [2022-07-22 22:27:27,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:27:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:27:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:27:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:27:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=508, Unknown=10, NotChecked=0, Total=600 [2022-07-22 22:27:27,664 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-22 22:27:54,093 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:28:06,145 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:28:18,214 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:28:30,255 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:28:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:30,475 INFO L93 Difference]: Finished difference Result 367 states and 484 transitions. [2022-07-22 22:28:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 22:28:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 50 [2022-07-22 22:28:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:30,477 INFO L225 Difference]: With dead ends: 367 [2022-07-22 22:28:30,477 INFO L226 Difference]: Without dead ends: 206 [2022-07-22 22:28:30,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 100.7s TimeCoverageRelationStatistics Valid=199, Invalid=1422, Unknown=19, NotChecked=0, Total=1640 [2022-07-22 22:28:30,478 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 161 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:30,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 997 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 205 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-07-22 22:28:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-22 22:28:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 146. [2022-07-22 22:28:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 114 states have (on average 1.2543859649122806) internal successors, (143), 119 states have internal predecessors, (143), 17 states have call successors, (17), 11 states have call predecessors, (17), 14 states have return successors, (26), 15 states have call predecessors, (26), 16 states have call successors, (26) [2022-07-22 22:28:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 186 transitions. [2022-07-22 22:28:30,489 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 186 transitions. Word has length 50 [2022-07-22 22:28:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:30,489 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 186 transitions. [2022-07-22 22:28:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-22 22:28:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 186 transitions. [2022-07-22 22:28:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 22:28:30,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:30,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:30,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:28:30,703 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,SelfDestructingSolverStorable14 [2022-07-22 22:28:30,703 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2080562516, now seen corresponding path program 2 times [2022-07-22 22:28:30,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:30,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181393271] [2022-07-22 22:28:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:28:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:28:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:28:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:30,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:28:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 22:28:30,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:30,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181393271] [2022-07-22 22:28:30,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181393271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:28:30,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:28:30,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 22:28:30,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322543123] [2022-07-22 22:28:30,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:28:30,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 22:28:30,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 22:28:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:28:30,867 INFO L87 Difference]: Start difference. First operand 146 states and 186 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 22:28:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:31,017 INFO L93 Difference]: Finished difference Result 266 states and 345 transitions. [2022-07-22 22:28:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 22:28:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-07-22 22:28:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:31,018 INFO L225 Difference]: With dead ends: 266 [2022-07-22 22:28:31,018 INFO L226 Difference]: Without dead ends: 167 [2022-07-22 22:28:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-22 22:28:31,019 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 25 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:28:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-22 22:28:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2022-07-22 22:28:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 125 states have internal predecessors, (148), 17 states have call successors, (17), 11 states have call predecessors, (17), 16 states have return successors, (29), 16 states have call predecessors, (29), 16 states have call successors, (29) [2022-07-22 22:28:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2022-07-22 22:28:31,028 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 52 [2022-07-22 22:28:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:31,029 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2022-07-22 22:28:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 22:28:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2022-07-22 22:28:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 22:28:31,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:31,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 22:28:31,030 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:31,030 INFO L85 PathProgramCache]: Analyzing trace with hash 48376912, now seen corresponding path program 1 times [2022-07-22 22:28:31,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450171554] [2022-07-22 22:28:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:28:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:28:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:28:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 22:28:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 22:28:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450171554] [2022-07-22 22:28:31,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450171554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:28:31,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:28:31,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:28:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947349856] [2022-07-22 22:28:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:28:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:28:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:28:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:28:31,122 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 22:28:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:31,143 INFO L93 Difference]: Finished difference Result 263 states and 338 transitions. [2022-07-22 22:28:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:28:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-07-22 22:28:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:31,145 INFO L225 Difference]: With dead ends: 263 [2022-07-22 22:28:31,145 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 22:28:31,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:28:31,146 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:31,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 250 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:28:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 22:28:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-07-22 22:28:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 106 states have internal predecessors, (127), 15 states have call successors, (15), 11 states have call predecessors, (15), 12 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 22:28:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-07-22 22:28:31,154 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 52 [2022-07-22 22:28:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:31,155 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-07-22 22:28:31,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 22:28:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-07-22 22:28:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 22:28:31,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:31,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:31,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 22:28:31,156 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2022-07-22 22:28:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121477110] [2022-07-22 22:28:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 22:28:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 22:28:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:28:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 22:28:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 22:28:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:28:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 22:28:31,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:31,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121477110] [2022-07-22 22:28:31,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121477110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:28:31,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:28:31,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 22:28:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914984435] [2022-07-22 22:28:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:28:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 22:28:31,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 22:28:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:28:31,333 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 22:28:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:31,488 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2022-07-22 22:28:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 22:28:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2022-07-22 22:28:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:31,489 INFO L225 Difference]: With dead ends: 138 [2022-07-22 22:28:31,490 INFO L226 Difference]: Without dead ends: 134 [2022-07-22 22:28:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:28:31,490 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 16 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:31,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 502 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:28:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-22 22:28:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-22 22:28:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 107 states have internal predecessors, (128), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 22:28:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2022-07-22 22:28:31,498 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 58 [2022-07-22 22:28:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:31,498 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2022-07-22 22:28:31,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-22 22:28:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2022-07-22 22:28:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 22:28:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:31,499 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:31,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 22:28:31,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716043, now seen corresponding path program 1 times [2022-07-22 22:28:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:31,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568264032] [2022-07-22 22:28:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:28:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:28:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:28:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:28:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:28:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:28:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:28:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:28:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 22:28:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 22:28:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:31,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568264032] [2022-07-22 22:28:31,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568264032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:28:31,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:28:31,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 22:28:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177622178] [2022-07-22 22:28:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:28:31,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 22:28:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:31,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 22:28:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 22:28:31,726 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 22:28:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:28:32,061 INFO L93 Difference]: Finished difference Result 143 states and 173 transitions. [2022-07-22 22:28:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:28:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2022-07-22 22:28:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:28:32,063 INFO L225 Difference]: With dead ends: 143 [2022-07-22 22:28:32,063 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 22:28:32,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 22:28:32,064 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:28:32,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 90 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 22:28:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 22:28:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-22 22:28:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 109 states have internal predecessors, (129), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 22:28:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2022-07-22 22:28:32,072 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 78 [2022-07-22 22:28:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:28:32,072 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2022-07-22 22:28:32,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 22:28:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2022-07-22 22:28:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 22:28:32,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:28:32,073 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:28:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 22:28:32,074 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:28:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:28:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2049062669, now seen corresponding path program 1 times [2022-07-22 22:28:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:28:32,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732592172] [2022-07-22 22:28:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:28:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:28:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:28:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:28:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:28:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:28:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:28:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:28:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:28:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 22:28:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 22:28:32,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:28:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732592172] [2022-07-22 22:28:32,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732592172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:28:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096412151] [2022-07-22 22:28:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:28:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:28:32,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:28:32,542 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) [2022-07-22 22:28:32,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:28:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:28:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 22:28:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:28:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:28:32,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-07-22 22:28:35,191 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 9 treesize of output 5 [2022-07-22 22:28:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 5 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 22:28:50,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:28:50,556 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 10 treesize of output 6 [2022-07-22 22:28:50,738 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 10 treesize of output 6 [2022-07-22 22:28:53,002 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 10 treesize of output 6 [2022-07-22 22:28:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096412151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:28:53,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:28:53,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2022-07-22 22:28:53,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718863431] [2022-07-22 22:28:53,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:28:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 22:28:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:28:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 22:28:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2367, Unknown=2, NotChecked=0, Total=2550 [2022-07-22 22:28:53,056 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 39 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 14 states have call successors, (18), 6 states have call predecessors, (18), 10 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-22 22:29:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:17,738 INFO L93 Difference]: Finished difference Result 244 states and 303 transitions. [2022-07-22 22:29:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 22:29:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 14 states have call successors, (18), 6 states have call predecessors, (18), 10 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) Word has length 78 [2022-07-22 22:29:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:17,741 INFO L225 Difference]: With dead ends: 244 [2022-07-22 22:29:17,742 INFO L226 Difference]: Without dead ends: 237 [2022-07-22 22:29:17,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=450, Invalid=6188, Unknown=4, NotChecked=0, Total=6642 [2022-07-22 22:29:17,744 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 115 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:29:17,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 775 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 875 Invalid, 0 Unknown, 459 Unchecked, 0.4s Time] [2022-07-22 22:29:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-22 22:29:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 169. [2022-07-22 22:29:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 139 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 16 states have return successors, (24), 14 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-22 22:29:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-07-22 22:29:17,766 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 78 [2022-07-22 22:29:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:17,767 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-07-22 22:29:17,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 3.121212121212121) internal successors, (103), 34 states have internal predecessors, (103), 14 states have call successors, (18), 6 states have call predecessors, (18), 10 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-22 22:29:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-07-22 22:29:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 22:29:17,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:17,770 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:29:17,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:17,989 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1852877617, now seen corresponding path program 1 times [2022-07-22 22:29:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063750947] [2022-07-22 22:29:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:29:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:29:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:29:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:29:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:29:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:29:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 22:29:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 22:29:18,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063750947] [2022-07-22 22:29:18,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063750947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:29:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810714999] [2022-07-22 22:29:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:18,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:18,380 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) [2022-07-22 22:29:18,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:29:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 22:29:18,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 22:29:19,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:29:19,774 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-22 22:29:19,774 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 30 treesize of output 25 [2022-07-22 22:29:19,781 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-22 22:29:19,782 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 24 treesize of output 12 [2022-07-22 22:29:19,877 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-22 22:29:19,877 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 30 treesize of output 25 [2022-07-22 22:29:19,888 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-22 22:29:19,889 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 24 treesize of output 12 [2022-07-22 22:29:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 22:29:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810714999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:29:19,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:29:19,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 13] total 35 [2022-07-22 22:29:19,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418591192] [2022-07-22 22:29:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:29:19,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 22:29:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:29:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 22:29:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 22:29:19,908 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 35 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-07-22 22:29:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:20,736 INFO L93 Difference]: Finished difference Result 234 states and 275 transitions. [2022-07-22 22:29:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 22:29:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 78 [2022-07-22 22:29:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:20,737 INFO L225 Difference]: With dead ends: 234 [2022-07-22 22:29:20,738 INFO L226 Difference]: Without dead ends: 227 [2022-07-22 22:29:20,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=2071, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 22:29:20,739 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 239 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:29:20,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 342 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 677 Invalid, 0 Unknown, 261 Unchecked, 0.3s Time] [2022-07-22 22:29:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-22 22:29:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2022-07-22 22:29:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 161 states have internal predecessors, (186), 18 states have call successors, (18), 17 states have call predecessors, (18), 19 states have return successors, (26), 16 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-22 22:29:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 230 transitions. [2022-07-22 22:29:20,754 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 230 transitions. Word has length 78 [2022-07-22 22:29:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:20,754 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 230 transitions. [2022-07-22 22:29:20,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-07-22 22:29:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 230 transitions. [2022-07-22 22:29:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 22:29:20,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:20,755 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:29:20,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:20,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:20,970 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2111043055, now seen corresponding path program 1 times [2022-07-22 22:29:20,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148558323] [2022-07-22 22:29:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:29:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:29:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:29:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:29:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:29:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:29:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 22:29:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 22:29:21,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:21,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148558323] [2022-07-22 22:29:21,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148558323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:29:21,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863498944] [2022-07-22 22:29:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:21,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:21,201 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) [2022-07-22 22:29:21,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:29:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 22:29:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:22,301 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_9| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_9| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_9|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_9|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_9| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_9| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_9|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_9|) 0)))) is different from true [2022-07-22 22:29:23,101 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_22| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_22|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_22|) 0))) (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_22| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_22|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_22|) 0)))) is different from true [2022-07-22 22:29:23,858 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_23| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_23| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_23|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_23|) 0))) (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_23| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_23| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_23|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_23|) 0)))) is different from true [2022-07-22 22:29:24,626 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_24| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_24| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_24|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_24|) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_24| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_24| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_24|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_24|) 0)))) is different from true [2022-07-22 22:29:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-22 22:29:24,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:29:25,437 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-22 22:29:25,438 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 24 treesize of output 23 [2022-07-22 22:29:25,443 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-07-22 22:29:25,443 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 20 treesize of output 12 [2022-07-22 22:29:25,570 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-22 22:29:25,570 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 24 treesize of output 23 [2022-07-22 22:29:25,575 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-07-22 22:29:25,576 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 20 treesize of output 12 [2022-07-22 22:29:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 22:29:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863498944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:29:25,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 22:29:25,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 13] total 39 [2022-07-22 22:29:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791472892] [2022-07-22 22:29:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 22:29:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 22:29:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:29:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 22:29:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1073, Unknown=4, NotChecked=276, Total=1482 [2022-07-22 22:29:25,587 INFO L87 Difference]: Start difference. First operand 195 states and 230 transitions. Second operand has 39 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 12 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-22 22:29:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:38,527 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2022-07-22 22:29:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 22:29:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 12 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 78 [2022-07-22 22:29:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:38,536 INFO L225 Difference]: With dead ends: 261 [2022-07-22 22:29:38,536 INFO L226 Difference]: Without dead ends: 254 [2022-07-22 22:29:38,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 147 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=392, Invalid=2922, Unknown=8, NotChecked=460, Total=3782 [2022-07-22 22:29:38,538 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 165 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:29:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 268 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 861 Invalid, 0 Unknown, 743 Unchecked, 0.5s Time] [2022-07-22 22:29:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-22 22:29:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 207. [2022-07-22 22:29:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 167 states have (on average 1.1976047904191616) internal successors, (200), 170 states have internal predecessors, (200), 19 states have call successors, (19), 18 states have call predecessors, (19), 20 states have return successors, (28), 18 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-22 22:29:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2022-07-22 22:29:38,555 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 78 [2022-07-22 22:29:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2022-07-22 22:29:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 34 states have internal predecessors, (120), 12 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-22 22:29:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2022-07-22 22:29:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 22:29:38,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:38,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:29:38,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 22:29:38,772 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1310004315, now seen corresponding path program 1 times [2022-07-22 22:29:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43506133] [2022-07-22 22:29:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:29:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:29:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:29:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 22:29:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 22:29:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 22:29:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 22:29:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 22:29:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:29:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 22:29:39,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43506133] [2022-07-22 22:29:39,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43506133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:29:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420380739] [2022-07-22 22:29:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:39,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:39,287 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) [2022-07-22 22:29:39,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:29:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-22 22:29:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:39,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-07-22 22:29:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:29:39,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-07-22 22:29:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 22:29:42,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:29:55,504 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:30:05,798 WARN L233 SmtUtils]: Spent 10.21s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:30:18,339 WARN L233 SmtUtils]: Spent 10.39s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:30:35,774 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:30:50,184 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:31:00,468 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:31:11,262 WARN L233 SmtUtils]: Spent 10.27s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:31:11,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420380739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:31:11,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:31:11,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 45 [2022-07-22 22:31:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521804339] [2022-07-22 22:31:11,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:31:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 22:31:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:31:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 22:31:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3517, Unknown=2, NotChecked=0, Total=3782 [2022-07-22 22:31:11,307 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand has 45 states, 40 states have (on average 2.85) internal successors, (114), 37 states have internal predecessors, (114), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19)