./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_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-tmp.no-commuhash-c3fed41 [2021-12-16 03:20:21,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:20:21,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:20:21,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:20:21,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:20:21,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:20:21,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:20:21,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:20:21,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:20:21,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:20:21,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:20:21,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:20:21,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:20:21,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:20:21,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:20:21,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:20:21,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:20:21,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:20:21,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:20:21,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:20:21,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:20:21,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:20:21,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:20:21,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:20:21,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:20:21,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:20:21,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:20:21,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:20:21,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:20:21,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:20:21,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:20:21,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:20:21,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:20:21,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:20:21,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:20:21,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:20:21,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:20:21,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:20:21,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:20:21,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:20:21,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:20:21,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:20:21,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:20:21,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:20:21,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:20:21,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:20:21,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:20:21,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:20:21,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:20:21,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:20:21,503 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:20:21,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:20:21,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:20:21,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:20:21,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:20:21,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:20:21,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:20:21,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:20:21,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:20:21,506 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:20:21,506 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:20:21,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:20:21,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:20:21,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-12-16 03:20:21,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:20:21,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:20:21,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:20:21,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:20:21,757 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:20:21,758 INFO L432 ainManager$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 [2021-12-16 03:20:21,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879d3c269/04a2bc8a8f5e4c928ccd7942eae82ab0/FLAG90bb38ba6 [2021-12-16 03:20:22,457 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:20:22,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-12-16 03:20:22,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879d3c269/04a2bc8a8f5e4c928ccd7942eae82ab0/FLAG90bb38ba6 [2021-12-16 03:20:22,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879d3c269/04a2bc8a8f5e4c928ccd7942eae82ab0 [2021-12-16 03:20:22,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:20:22,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:20:22,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:20:22,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:20:22,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:20:22,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:20:22" (1/1) ... [2021-12-16 03:20:22,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fe78bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:22, skipping insertion in model container [2021-12-16 03:20:22,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:20:22" (1/1) ... [2021-12-16 03:20:22,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:20:22,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:20:23,125 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] [2021-12-16 03:20:23,130 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] [2021-12-16 03:20:23,604 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,608 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,610 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,621 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,629 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,630 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,633 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,633 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,635 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,635 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:20:23,815 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:20:23,816 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:20:23,817 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:20:23,818 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:20:23,818 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:20:23,818 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:20:23,819 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:20:23,819 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:20:23,823 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:20:23,909 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:20:23,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:20:23,944 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:20:23,961 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] [2021-12-16 03:20:23,961 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] [2021-12-16 03:20:23,993 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,994 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,994 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,994 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:23,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,004 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,005 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,005 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,008 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:20:24,038 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:20:24,038 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:20:24,039 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:20:24,039 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:20:24,039 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:20:24,040 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:20:24,040 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:20:24,040 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:20:24,041 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:20:24,041 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:20:24,056 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:20:24,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:20:24,224 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:20:24,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24 WrapperNode [2021-12-16 03:20:24,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:20:24,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:20:24,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:20:24,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:20:24,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,325 INFO L137 Inliner]: procedures = 679, calls = 1036, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 93 [2021-12-16 03:20:24,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:20:24,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:20:24,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:20:24,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:20:24,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:20:24,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:20:24,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:20:24,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:20:24,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (1/1) ... [2021-12-16 03:20:24,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:20:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:24,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 03:20:24,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 03:20:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-12-16 03:20:24,544 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-12-16 03:20:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:20:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:20:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:20:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-16 03:20:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-16 03:20:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-16 03:20:24,546 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-16 03:20:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:20:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:20:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:20:24,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:20:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-16 03:20:24,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-16 03:20:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:20:24,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:20:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:20:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:20:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:20:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:20:24,746 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:20:24,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:20:24,904 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:20:24,918 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:20:24,919 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 03:20:24,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:20:24 BoogieIcfgContainer [2021-12-16 03:20:24,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:20:24,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:20:24,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:20:24,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:20:24,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:20:22" (1/3) ... [2021-12-16 03:20:24,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cb0c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:20:24, skipping insertion in model container [2021-12-16 03:20:24,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:20:24" (2/3) ... [2021-12-16 03:20:24,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cb0c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:20:24, skipping insertion in model container [2021-12-16 03:20:24,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:20:24" (3/3) ... [2021-12-16 03:20:24,925 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2021-12-16 03:20:24,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:20:24,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:20:24,956 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:20:24,959 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:20:24,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:20:24,973 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) [2021-12-16 03:20:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:24,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:24,978 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:24,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2021-12-16 03:20:24,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:24,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703661001] [2021-12-16 03:20:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:25,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703661001] [2021-12-16 03:20:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703661001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:25,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:20:25,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195409106] [2021-12-16 03:20:25,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:25,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:20:25,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:20:25,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:20:25,419 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) [2021-12-16 03:20:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:25,444 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2021-12-16 03:20:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:20:25,446 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 [2021-12-16 03:20:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:25,453 INFO L225 Difference]: With dead ends: 117 [2021-12-16 03:20:25,453 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 03:20:25,464 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:25,467 INFO L933 BasicCegarLoop]: 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 [2021-12-16 03:20:25,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 03:20:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-16 03:20:25,501 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) [2021-12-16 03:20:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-12-16 03:20:25,509 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2021-12-16 03:20:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-12-16 03:20:25,512 INFO L471 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) [2021-12-16 03:20:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-12-16 03:20:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:25,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:25,517 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:25,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:20:25,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2021-12-16 03:20:25,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:25,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328564750] [2021-12-16 03:20:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:25,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:25,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328564750] [2021-12-16 03:20:25,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328564750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:25,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:25,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:20:25,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924771744] [2021-12-16 03:20:25,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:25,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:20:25,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:20:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:20:25,743 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) [2021-12-16 03:20:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:25,976 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2021-12-16 03:20:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:20:25,977 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 [2021-12-16 03:20:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:25,979 INFO L225 Difference]: With dead ends: 108 [2021-12-16 03:20:25,979 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 03:20:25,979 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:25,980 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:25,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 342 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 03:20:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-16 03:20:25,986 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) [2021-12-16 03:20:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-12-16 03:20:25,987 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 26 [2021-12-16 03:20:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:25,988 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-12-16 03:20:25,988 INFO L471 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) [2021-12-16 03:20:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-12-16 03:20:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:25,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:25,989 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:25,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:20:25,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2021-12-16 03:20:25,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:25,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628559605] [2021-12-16 03:20:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:25,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:26,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628559605] [2021-12-16 03:20:26,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628559605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:26,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:20:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734957554] [2021-12-16 03:20:26,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:20:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:20:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:20:26,207 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) [2021-12-16 03:20:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:26,429 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2021-12-16 03:20:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:20:26,432 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 [2021-12-16 03:20:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:26,433 INFO L225 Difference]: With dead ends: 124 [2021-12-16 03:20:26,433 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 03:20:26,434 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:26,435 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 77 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:26,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 433 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 03:20:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-12-16 03:20:26,441 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) [2021-12-16 03:20:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2021-12-16 03:20:26,442 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 26 [2021-12-16 03:20:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:26,442 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2021-12-16 03:20:26,443 INFO L471 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) [2021-12-16 03:20:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2021-12-16 03:20:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:26,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:26,444 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:26,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:20:26,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2021-12-16 03:20:26,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:26,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143328849] [2021-12-16 03:20:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:26,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:26,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:26,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143328849] [2021-12-16 03:20:26,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143328849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:26,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:26,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:20:26,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427087070] [2021-12-16 03:20:26,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:26,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:20:26,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:20:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:20:26,632 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) [2021-12-16 03:20:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:26,820 INFO L93 Difference]: Finished difference Result 152 states and 207 transitions. [2021-12-16 03:20:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:20:26,821 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 [2021-12-16 03:20:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:26,823 INFO L225 Difference]: With dead ends: 152 [2021-12-16 03:20:26,823 INFO L226 Difference]: Without dead ends: 90 [2021-12-16 03:20:26,824 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:26,825 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 87 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:26,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 396 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-16 03:20:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-12-16 03:20:26,833 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) [2021-12-16 03:20:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2021-12-16 03:20:26,834 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 26 [2021-12-16 03:20:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:26,834 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2021-12-16 03:20:26,834 INFO L471 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) [2021-12-16 03:20:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2021-12-16 03:20:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:26,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:26,836 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:26,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:20:26,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2021-12-16 03:20:26,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924171849] [2021-12-16 03:20:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:26,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:26,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924171849] [2021-12-16 03:20:26,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924171849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:26,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:26,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:20:26,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093694479] [2021-12-16 03:20:26,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:26,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:20:26,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:20:26,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:20:26,954 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) [2021-12-16 03:20:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:27,127 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2021-12-16 03:20:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:20:27,128 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 [2021-12-16 03:20:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:27,129 INFO L225 Difference]: With dead ends: 176 [2021-12-16 03:20:27,129 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 03:20:27,130 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:27,130 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 75 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:27,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 506 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 03:20:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2021-12-16 03:20:27,136 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) [2021-12-16 03:20:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2021-12-16 03:20:27,136 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 26 [2021-12-16 03:20:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2021-12-16 03:20:27,137 INFO L471 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) [2021-12-16 03:20:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2021-12-16 03:20:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 03:20:27,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:27,138 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:27,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:20:27,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2021-12-16 03:20:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:27,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682204970] [2021-12-16 03:20:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:27,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:27,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682204970] [2021-12-16 03:20:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682204970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:27,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:27,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:20:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92193924] [2021-12-16 03:20:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:27,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:20:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:20:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:20:27,215 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) [2021-12-16 03:20:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:27,252 INFO L93 Difference]: Finished difference Result 173 states and 239 transitions. [2021-12-16 03:20:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:20:27,253 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 [2021-12-16 03:20:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:27,253 INFO L225 Difference]: With dead ends: 173 [2021-12-16 03:20:27,254 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 03:20:27,254 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:27,255 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 45 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:27,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 397 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 03:20:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-16 03:20:27,259 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) [2021-12-16 03:20:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2021-12-16 03:20:27,260 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 26 [2021-12-16 03:20:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:27,260 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2021-12-16 03:20:27,260 INFO L471 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) [2021-12-16 03:20:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2021-12-16 03:20:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 03:20:27,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:27,261 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:27,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:20:27,262 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2021-12-16 03:20:27,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556530641] [2021-12-16 03:20:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:27,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:27,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:27,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556530641] [2021-12-16 03:20:27,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556530641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:27,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:27,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:20:27,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601035074] [2021-12-16 03:20:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:27,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:20:27,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:20:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:20:27,352 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) [2021-12-16 03:20:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:27,431 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2021-12-16 03:20:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:20:27,432 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 [2021-12-16 03:20:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:27,433 INFO L225 Difference]: With dead ends: 141 [2021-12-16 03:20:27,433 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 03:20:27,433 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:27,434 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:27,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 342 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 03:20:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-12-16 03:20:27,439 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) [2021-12-16 03:20:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-12-16 03:20:27,440 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 28 [2021-12-16 03:20:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-12-16 03:20:27,440 INFO L471 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) [2021-12-16 03:20:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-12-16 03:20:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 03:20:27,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:27,441 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:27,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:20:27,442 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2021-12-16 03:20:27,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317045733] [2021-12-16 03:20:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:27,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:27,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317045733] [2021-12-16 03:20:27,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317045733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:27,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:27,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:20:27,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126796138] [2021-12-16 03:20:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:27,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:20:27,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:20:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:20:27,532 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) [2021-12-16 03:20:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:27,649 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2021-12-16 03:20:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:20:27,649 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 [2021-12-16 03:20:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:27,650 INFO L225 Difference]: With dead ends: 159 [2021-12-16 03:20:27,650 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 03:20:27,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:20:27,651 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:27,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 381 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 03:20:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-12-16 03:20:27,656 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) [2021-12-16 03:20:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-12-16 03:20:27,656 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 30 [2021-12-16 03:20:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:27,657 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-12-16 03:20:27,657 INFO L471 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) [2021-12-16 03:20:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-12-16 03:20:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 03:20:27,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:27,658 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:27,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:20:27,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2021-12-16 03:20:27,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328780122] [2021-12-16 03:20:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:27,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:27,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328780122] [2021-12-16 03:20:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328780122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:27,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:27,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:20:27,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343587021] [2021-12-16 03:20:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:20:27,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:20:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:20:27,721 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) [2021-12-16 03:20:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:27,759 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2021-12-16 03:20:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:20:27,760 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 [2021-12-16 03:20:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:27,760 INFO L225 Difference]: With dead ends: 149 [2021-12-16 03:20:27,760 INFO L226 Difference]: Without dead ends: 84 [2021-12-16 03:20:27,761 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:27,761 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:27,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 299 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-16 03:20:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-12-16 03:20:27,766 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) [2021-12-16 03:20:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-12-16 03:20:27,767 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 31 [2021-12-16 03:20:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:27,767 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-12-16 03:20:27,767 INFO L471 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) [2021-12-16 03:20:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-12-16 03:20:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 03:20:27,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:27,768 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:27,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:20:27,769 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2021-12-16 03:20:27,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888341094] [2021-12-16 03:20:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:27,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:28,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:28,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888341094] [2021-12-16 03:20:28,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888341094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:28,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:28,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:20:28,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142994671] [2021-12-16 03:20:28,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:28,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:20:28,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:20:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:20:28,133 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) [2021-12-16 03:20:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:28,614 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2021-12-16 03:20:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:20:28,615 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 [2021-12-16 03:20:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:28,616 INFO L225 Difference]: With dead ends: 164 [2021-12-16 03:20:28,616 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 03:20:28,616 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:28,617 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 59 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:28,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 532 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:20:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 03:20:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-12-16 03:20:28,622 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) [2021-12-16 03:20:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-12-16 03:20:28,623 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2021-12-16 03:20:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:28,623 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-12-16 03:20:28,624 INFO L471 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) [2021-12-16 03:20:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-12-16 03:20:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 03:20:28,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:28,624 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:28,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:20:28,625 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2021-12-16 03:20:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:28,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107495398] [2021-12-16 03:20:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:28,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:28,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:28,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107495398] [2021-12-16 03:20:28,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107495398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:28,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:28,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 03:20:28,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448710790] [2021-12-16 03:20:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:28,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:20:28,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:20:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:20:28,872 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 03:20:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:29,437 INFO L93 Difference]: Finished difference Result 182 states and 246 transitions. [2021-12-16 03:20:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 03:20:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-12-16 03:20:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:29,438 INFO L225 Difference]: With dead ends: 182 [2021-12-16 03:20:29,438 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 03:20:29,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-12-16 03:20:29,440 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 106 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:29,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 540 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:20:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 03:20:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-12-16 03:20:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 73 states have internal predecessors, (88), 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) [2021-12-16 03:20:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2021-12-16 03:20:29,448 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 39 [2021-12-16 03:20:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:29,449 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2021-12-16 03:20:29,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 03:20:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2021-12-16 03:20:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 03:20:29,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:29,450 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:20:29,450 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2021-12-16 03:20:29,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:29,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088629031] [2021-12-16 03:20:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:29,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:29,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088629031] [2021-12-16 03:20:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088629031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:29,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:29,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:20:29,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402393432] [2021-12-16 03:20:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:29,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:20:29,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:20:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:20:29,585 INFO L87 Difference]: Start difference. First operand 91 states and 120 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) [2021-12-16 03:20:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:29,770 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2021-12-16 03:20:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:20:29,771 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 [2021-12-16 03:20:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:29,772 INFO L225 Difference]: With dead ends: 215 [2021-12-16 03:20:29,772 INFO L226 Difference]: Without dead ends: 106 [2021-12-16 03:20:29,773 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:29,773 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 59 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:29,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 563 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-16 03:20:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2021-12-16 03:20:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 74 states have internal predecessors, (88), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2021-12-16 03:20:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-12-16 03:20:29,782 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 39 [2021-12-16 03:20:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-12-16 03:20:29,783 INFO L471 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) [2021-12-16 03:20:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-12-16 03:20:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 03:20:29,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:29,784 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:29,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:20:29,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2021-12-16 03:20:29,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304858351] [2021-12-16 03:20:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:29,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:29,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304858351] [2021-12-16 03:20:29,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304858351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583531655] [2021-12-16 03:20:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:29,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:29,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:20:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 03:20:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:30,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:30,818 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-16 03:20:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 03:20:30,826 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-12-16 03:20:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-12-16 03:20:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:30,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583531655] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:30,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:20:30,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 23 [2021-12-16 03:20:30,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537780312] [2021-12-16 03:20:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:30,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:20:30,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:20:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-12-16 03:20:30,865 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:20:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:31,004 INFO L93 Difference]: Finished difference Result 198 states and 264 transitions. [2021-12-16 03:20:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:20:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-12-16 03:20:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:31,005 INFO L225 Difference]: With dead ends: 198 [2021-12-16 03:20:31,005 INFO L226 Difference]: Without dead ends: 113 [2021-12-16 03:20:31,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-12-16 03:20:31,007 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 27 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:31,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 330 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-16 03:20:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2021-12-16 03:20:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 79 states have internal predecessors, (96), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-16 03:20:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-12-16 03:20:31,016 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 41 [2021-12-16 03:20:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:31,016 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-12-16 03:20:31,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 03:20:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-12-16 03:20:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 03:20:31,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:31,018 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:31,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:31,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 03:20:31,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2021-12-16 03:20:31,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052002113] [2021-12-16 03:20:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:31,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:20:31,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052002113] [2021-12-16 03:20:31,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052002113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:31,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:31,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:20:31,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136863138] [2021-12-16 03:20:31,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:31,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:20:31,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:20:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:20:31,371 INFO L87 Difference]: Start difference. First operand 99 states and 131 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) [2021-12-16 03:20:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:31,430 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2021-12-16 03:20:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:20:31,430 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 [2021-12-16 03:20:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:31,431 INFO L225 Difference]: With dead ends: 115 [2021-12-16 03:20:31,431 INFO L226 Difference]: Without dead ends: 113 [2021-12-16 03:20:31,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:20:31,432 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:31,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 459 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-16 03:20:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-12-16 03:20:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 80 states have (on average 1.275) internal successors, (102), 86 states have internal predecessors, (102), 15 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2021-12-16 03:20:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-12-16 03:20:31,442 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 42 [2021-12-16 03:20:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-12-16 03:20:31,443 INFO L471 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) [2021-12-16 03:20:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-12-16 03:20:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 03:20:31,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:31,444 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:31,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:20:31,444 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2021-12-16 03:20:31,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620822950] [2021-12-16 03:20:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:31,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:20:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 03:20:31,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:31,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620822950] [2021-12-16 03:20:31,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620822950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:31,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53803231] [2021-12-16 03:20:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:31,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:31,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:20:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 03:20:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,952 INFO L388 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 [2021-12-16 03:20:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:31,963 INFO L388 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 [2021-12-16 03:20:54,485 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 03:20:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:54,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:55,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-16 03:20:55,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-12-16 03:20:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 03:20:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53803231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:20:55,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:20:55,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 24 [2021-12-16 03:20:55,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055764104] [2021-12-16 03:20:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:20:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 03:20:55,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 03:20:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=459, Unknown=6, NotChecked=0, Total=552 [2021-12-16 03:20:55,209 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 03:20:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:55,425 INFO L93 Difference]: Finished difference Result 307 states and 402 transitions. [2021-12-16 03:20:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 03:20:55,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 50 [2021-12-16 03:20:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:55,427 INFO L225 Difference]: With dead ends: 307 [2021-12-16 03:20:55,427 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 03:20:55,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=101, Invalid=543, Unknown=6, NotChecked=0, Total=650 [2021-12-16 03:20:55,429 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 93 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:55,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 813 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-12-16 03:20:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 03:20:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2021-12-16 03:20:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 116 states have internal predecessors, (136), 17 states have call successors, (17), 10 states have call predecessors, (17), 15 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2021-12-16 03:20:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2021-12-16 03:20:55,445 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 50 [2021-12-16 03:20:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:55,446 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2021-12-16 03:20:55,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 03:20:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2021-12-16 03:20:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 03:20:55,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:55,446 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-12-16 03:20:55,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 03:20:55,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:20:55,655 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1069445266, now seen corresponding path program 1 times [2021-12-16 03:20:55,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:55,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081538909] [2021-12-16 03:20:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:55,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:20:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 03:20:55,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081538909] [2021-12-16 03:20:55,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081538909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:55,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:55,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:20:55,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718378637] [2021-12-16 03:20:55,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:20:55,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:20:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:20:55,804 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-12-16 03:20:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:55,822 INFO L93 Difference]: Finished difference Result 236 states and 303 transitions. [2021-12-16 03:20:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:20:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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 [2021-12-16 03:20:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:55,823 INFO L225 Difference]: With dead ends: 236 [2021-12-16 03:20:55,823 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 03:20:55,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:20:55,825 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:55,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 03:20:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-16 03:20:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 107 states have internal predecessors, (122), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (23), 13 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-16 03:20:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2021-12-16 03:20:55,835 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 52 [2021-12-16 03:20:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:55,835 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2021-12-16 03:20:55,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-12-16 03:20:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2021-12-16 03:20:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 03:20:55,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:55,836 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:55,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:20:55,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2021-12-16 03:20:55,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:55,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642627462] [2021-12-16 03:20:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:55,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 03:20:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 03:20:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:20:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:55,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 03:20:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:20:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 03:20:56,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642627462] [2021-12-16 03:20:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642627462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:56,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:56,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:20:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684734153] [2021-12-16 03:20:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:20:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:20:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:20:56,010 INFO L87 Difference]: Start difference. First operand 131 states and 161 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) [2021-12-16 03:20:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:56,172 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2021-12-16 03:20:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:20:56,173 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 [2021-12-16 03:20:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:56,174 INFO L225 Difference]: With dead ends: 137 [2021-12-16 03:20:56,174 INFO L226 Difference]: Without dead ends: 133 [2021-12-16 03:20:56,174 INFO L932 BasicCegarLoop]: 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 [2021-12-16 03:20:56,174 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 18 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:56,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 512 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-16 03:20:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-16 03:20:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 108 states have internal predecessors, (123), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (23), 13 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-16 03:20:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2021-12-16 03:20:56,196 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 58 [2021-12-16 03:20:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:56,197 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2021-12-16 03:20:56,197 INFO L471 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) [2021-12-16 03:20:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2021-12-16 03:20:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-16 03:20:56,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:56,198 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:56,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:20:56,198 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716043, now seen corresponding path program 1 times [2021-12-16 03:20:56,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848276268] [2021-12-16 03:20:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:56,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:20:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:20:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:20:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:20:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:20:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:20:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 03:20:56,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848276268] [2021-12-16 03:20:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848276268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:56,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:20:56,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:20:56,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094907888] [2021-12-16 03:20:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:56,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:20:56,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:20:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:20:56,499 INFO L87 Difference]: Start difference. First operand 133 states and 162 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) [2021-12-16 03:20:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:56,805 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2021-12-16 03:20:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:20:56,806 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 [2021-12-16 03:20:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:56,806 INFO L225 Difference]: With dead ends: 142 [2021-12-16 03:20:56,806 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 03:20:56,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:20:56,807 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:56,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 100 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:20:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 03:20:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-16 03:20:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 105 states have (on average 1.180952380952381) internal successors, (124), 110 states have internal predecessors, (124), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (23), 13 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-16 03:20:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-12-16 03:20:56,815 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 78 [2021-12-16 03:20:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:56,815 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-12-16 03:20:56,815 INFO L471 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) [2021-12-16 03:20:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-12-16 03:20:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-16 03:20:56,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:56,816 INFO L514 BasicCegarLoop]: 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] [2021-12-16 03:20:56,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:20:56,816 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2049062669, now seen corresponding path program 1 times [2021-12-16 03:20:56,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:56,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80662252] [2021-12-16 03:20:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:56,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:20:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:56,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 03:20:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:20:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:20:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:20:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:20:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 03:20:57,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80662252] [2021-12-16 03:20:57,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80662252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021577025] [2021-12-16 03:20:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:57,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:57,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:57,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:20:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-16 03:20:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:59,641 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| 24)) 0)))) is different from true [2021-12-16 03:21:01,805 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24)) 0)))) is different from true [2021-12-16 03:21:07,977 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)) 0)))) is different from true [2021-12-16 03:21:10,438 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)) 0)))) is different from true [2021-12-16 03:21:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-16 03:21:12,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:21:13,645 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-16 03:21:13,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-16 03:21:13,651 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-16 03:21:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-16 03:21:13,828 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-16 03:21:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-16 03:21:13,833 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-16 03:21:13,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-16 03:21:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 03:21:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021577025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:21:13,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:21:13,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 13] total 40 [2021-12-16 03:21:13,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630275561] [2021-12-16 03:21:13,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:21:13,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 03:21:13,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 03:21:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1113, Unknown=4, NotChecked=284, Total=1560 [2021-12-16 03:21:13,917 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 40 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 12 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23)