./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_end_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_end_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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:46:11,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:46:11,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:46:11,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:46:11,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:46:11,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:46:11,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:46:11,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:46:11,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:46:11,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:46:11,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:46:11,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:46:11,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:46:11,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:46:11,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:46:11,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:46:11,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:46:11,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:46:11,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:46:11,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:46:11,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:46:11,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:46:11,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:46:11,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:46:11,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:46:11,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:46:11,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:46:11,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:46:11,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:46:11,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:46:11,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:46:11,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:46:11,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:46:11,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:46:11,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:46:11,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:46:11,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:46:11,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:46:11,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:46:11,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:46:11,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:46:11,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:46:11,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:46:11,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:46:11,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:46:11,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:46:11,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:46:11,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:46:11,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:46:11,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:46:11,499 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:46:11,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:46:11,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:46:11,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:46:11,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:46:11,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:46:11,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:46:11,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:46:11,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:46:11,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:46:11,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:46:11,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:46:11,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-12-18 00:46:11,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:46:11,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:46:11,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:46:11,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:46:11,705 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:46:11,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-18 00:46:11,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4c8bb44/83efdefa4ea04123a8fc84a135c4b344/FLAGab72818ec [2021-12-18 00:46:12,297 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:46:12,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-18 00:46:12,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4c8bb44/83efdefa4ea04123a8fc84a135c4b344/FLAGab72818ec [2021-12-18 00:46:12,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4c8bb44/83efdefa4ea04123a8fc84a135c4b344 [2021-12-18 00:46:12,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:46:12,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:46:12,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:46:12,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:46:12,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:46:12,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:46:12" (1/1) ... [2021-12-18 00:46:12,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d1f876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:12, skipping insertion in model container [2021-12-18 00:46:12,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:46:12" (1/1) ... [2021-12-18 00:46:12,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:46:12,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:46:13,040 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_end_harness.i[4493,4506] [2021-12-18 00:46:13,044 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_end_harness.i[4553,4566] [2021-12-18 00:46:13,428 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,431 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,431 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,433 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,444 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,447 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,451 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,452 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,453 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,454 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,455 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,665 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:46:13,666 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:46:13,667 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:46:13,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:46:13,668 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:46:13,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:46:13,669 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:46:13,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:46:13,670 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:46:13,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:46:13,745 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:46:13,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:46:13,767 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:46:13,800 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_end_harness.i[4493,4506] [2021-12-18 00:46:13,801 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_end_harness.i[4553,4566] [2021-12-18 00:46:13,877 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,887 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,895 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,895 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,897 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,898 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,898 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:46:13,917 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:46:13,917 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:46:13,918 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:46:13,918 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:46:13,919 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:46:13,919 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:46:13,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:46:13,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:46:13,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:46:13,920 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:46:13,933 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:46:13,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:46:14,148 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:46:14,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14 WrapperNode [2021-12-18 00:46:14,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:46:14,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:46:14,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:46:14,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:46:14,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,278 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-12-18 00:46:14,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:46:14,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:46:14,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:46:14,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:46:14,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:46:14,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:46:14,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:46:14,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:46:14,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (1/1) ... [2021-12-18 00:46:14,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:46:14,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:14,345 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) [2021-12-18 00:46:14,363 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 [2021-12-18 00:46:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:46:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:46:14,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:46:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:46:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:46:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:46:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-18 00:46:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-18 00:46:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:46:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:46:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:46:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:46:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:46:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:46:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:46:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:46:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:46:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:46:14,375 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:46:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:46:14,540 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:46:14,542 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:46:14,717 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:46:14,721 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:46:14,721 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 00:46:14,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:46:14 BoogieIcfgContainer [2021-12-18 00:46:14,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:46:14,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:46:14,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:46:14,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:46:14,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:46:12" (1/3) ... [2021-12-18 00:46:14,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393b7d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:46:14, skipping insertion in model container [2021-12-18 00:46:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:46:14" (2/3) ... [2021-12-18 00:46:14,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393b7d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:46:14, skipping insertion in model container [2021-12-18 00:46:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:46:14" (3/3) ... [2021-12-18 00:46:14,730 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-12-18 00:46:14,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:46:14,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:46:14,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:46:14,777 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 [2021-12-18 00:46:14,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:46:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 00:46:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:46:14,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:14,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:14,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-12-18 00:46:14,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:14,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907269397] [2021-12-18 00:46:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:14,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:46:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:46:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:46:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:46:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 00:46:15,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:15,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907269397] [2021-12-18 00:46:15,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907269397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:15,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:46:15,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 00:46:15,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733110425] [2021-12-18 00:46:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:15,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 00:46:15,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 00:46:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:46:15,277 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:15,304 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-12-18 00:46:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:46:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-18 00:46:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:15,311 INFO L225 Difference]: With dead ends: 128 [2021-12-18 00:46:15,311 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 00:46:15,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:46:15,316 INFO L933 BasicCegarLoop]: 87 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, 87 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 [2021-12-18 00:46:15,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:46:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 00:46:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-18 00:46:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:46:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-12-18 00:46:15,342 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-12-18 00:46:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:15,343 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-12-18 00:46:15,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-12-18 00:46:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:46:15,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:15,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:15,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 00:46:15,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-12-18 00:46:15,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835218971] [2021-12-18 00:46:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:15,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:46:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:46:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:46:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:46:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:46:15,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835218971] [2021-12-18 00:46:15,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835218971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318171468] [2021-12-18 00:46:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:15,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:15,522 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) [2021-12-18 00:46:15,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:46:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 00:46:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 00:46:15,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 00:46:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-18 00:46:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-18 00:46:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:16,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318171468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-12-18 00:46:16,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459740633] [2021-12-18 00:46:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:16,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:46:16,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:16,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:46:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:46:16,152 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:46:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:16,235 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-12-18 00:46:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:46:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-18 00:46:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:16,238 INFO L225 Difference]: With dead ends: 144 [2021-12-18 00:46:16,238 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 00:46:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:46:16,239 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:16,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-18 00:46:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 00:46:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-12-18 00:46:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-18 00:46:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-12-18 00:46:16,248 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-12-18 00:46:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:16,248 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-12-18 00:46:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:46:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-12-18 00:46:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:46:16,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:16,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:16,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:16,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:16,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-12-18 00:46:16,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269961804] [2021-12-18 00:46:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:16,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:46:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:46:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:46:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:46:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:46:16,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269961804] [2021-12-18 00:46:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269961804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:16,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314773013] [2021-12-18 00:46:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:16,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:16,674 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) [2021-12-18 00:46:16,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:46:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 00:46:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:16,947 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-18 00:46:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-18 00:46:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-18 00:46:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-18 00:46:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-18 00:46:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:46:16,996 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 13 [2021-12-18 00:46:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:17,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314773013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:17,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:17,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-12-18 00:46:17,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322136550] [2021-12-18 00:46:17,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:17,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:46:17,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:46:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:46:17,319 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:46:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:17,469 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2021-12-18 00:46:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 00:46:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-18 00:46:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:17,471 INFO L225 Difference]: With dead ends: 208 [2021-12-18 00:46:17,472 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 00:46:17,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:46:17,473 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 156 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:17,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 719 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 62 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2021-12-18 00:46:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 00:46:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2021-12-18 00:46:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 96 states have (on average 1.34375) internal successors, (129), 98 states have internal predecessors, (129), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (27), 22 states have call predecessors, (27), 22 states have call successors, (27) [2021-12-18 00:46:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2021-12-18 00:46:17,484 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 68 [2021-12-18 00:46:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:17,484 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2021-12-18 00:46:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 00:46:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2021-12-18 00:46:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:46:17,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:17,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:17,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:17,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-18 00:46:17,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 779681482, now seen corresponding path program 1 times [2021-12-18 00:46:17,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:17,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118552947] [2021-12-18 00:46:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:17,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:46:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:46:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:46:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:46:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:46:17,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118552947] [2021-12-18 00:46:17,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118552947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188460754] [2021-12-18 00:46:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:17,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:17,868 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) [2021-12-18 00:46:17,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:46:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:46:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:18,046 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:18,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:18,054 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:18,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:18,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:46:18,742 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:46:18,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2021-12-18 00:46:18,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:46:18,749 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:46:18,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-12-18 00:46:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 00:46:18,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:46:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188460754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:46:19,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:46:19,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2021-12-18 00:46:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626312161] [2021-12-18 00:46:19,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:46:19,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:46:19,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:46:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-18 00:46:19,299 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-18 00:46:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:20,833 INFO L93 Difference]: Finished difference Result 392 states and 652 transitions. [2021-12-18 00:46:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 00:46:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2021-12-18 00:46:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:20,840 INFO L225 Difference]: With dead ends: 392 [2021-12-18 00:46:20,840 INFO L226 Difference]: Without dead ends: 292 [2021-12-18 00:46:20,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=2976, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 00:46:20,843 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 204 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:20,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1638 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1069 Invalid, 0 Unknown, 274 Unchecked, 0.6s Time] [2021-12-18 00:46:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-18 00:46:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 252. [2021-12-18 00:46:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 185 states have (on average 1.3513513513513513) internal successors, (250), 191 states have internal predecessors, (250), 47 states have call successors, (47), 15 states have call predecessors, (47), 19 states have return successors, (116), 45 states have call predecessors, (116), 45 states have call successors, (116) [2021-12-18 00:46:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 413 transitions. [2021-12-18 00:46:20,876 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 413 transitions. Word has length 68 [2021-12-18 00:46:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:20,876 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 413 transitions. [2021-12-18 00:46:20,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-18 00:46:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 413 transitions. [2021-12-18 00:46:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 00:46:20,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:20,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:20,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 00:46:21,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:21,113 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-12-18 00:46:21,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469482689] [2021-12-18 00:46:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:21,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:46:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:46:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:46:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:46:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:46:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469482689] [2021-12-18 00:46:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469482689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671866193] [2021-12-18 00:46:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:21,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:21,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:46:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:46:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:21,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671866193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:21,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:21,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-18 00:46:21,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815694567] [2021-12-18 00:46:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:21,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:46:21,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:46:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:46:21,560 INFO L87 Difference]: Start difference. First operand 252 states and 413 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:21,701 INFO L93 Difference]: Finished difference Result 472 states and 817 transitions. [2021-12-18 00:46:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:46:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-12-18 00:46:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:21,705 INFO L225 Difference]: With dead ends: 472 [2021-12-18 00:46:21,705 INFO L226 Difference]: Without dead ends: 269 [2021-12-18 00:46:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:46:21,708 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:21,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:46:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-18 00:46:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2021-12-18 00:46:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 195 states have (on average 1.323076923076923) internal successors, (258), 206 states have internal predecessors, (258), 47 states have call successors, (47), 15 states have call predecessors, (47), 24 states have return successors, (145), 45 states have call predecessors, (145), 45 states have call successors, (145) [2021-12-18 00:46:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 450 transitions. [2021-12-18 00:46:21,745 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 450 transitions. Word has length 70 [2021-12-18 00:46:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 450 transitions. [2021-12-18 00:46:21,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 450 transitions. [2021-12-18 00:46:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 00:46:21,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:21,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:21,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:21,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:21,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-12-18 00:46:21,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142670545] [2021-12-18 00:46:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:21,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:21,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:46:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:46:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:46:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:46:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:46:22,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142670545] [2021-12-18 00:46:22,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142670545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823726295] [2021-12-18 00:46:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:22,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:22,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:22,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:46:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:46:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:22,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:22,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823726295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:22,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:22,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-18 00:46:22,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594167954] [2021-12-18 00:46:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:22,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:46:22,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:46:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:46:22,315 INFO L87 Difference]: Start difference. First operand 267 states and 450 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:22,500 INFO L93 Difference]: Finished difference Result 549 states and 1003 transitions. [2021-12-18 00:46:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:46:22,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-18 00:46:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:22,503 INFO L225 Difference]: With dead ends: 549 [2021-12-18 00:46:22,503 INFO L226 Difference]: Without dead ends: 329 [2021-12-18 00:46:22,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-18 00:46:22,505 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:22,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:46:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-18 00:46:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 277. [2021-12-18 00:46:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 205 states have (on average 1.3219512195121952) internal successors, (271), 216 states have internal predecessors, (271), 47 states have call successors, (47), 15 states have call predecessors, (47), 24 states have return successors, (145), 45 states have call predecessors, (145), 45 states have call successors, (145) [2021-12-18 00:46:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 463 transitions. [2021-12-18 00:46:22,537 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 463 transitions. Word has length 72 [2021-12-18 00:46:22,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:22,538 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 463 transitions. [2021-12-18 00:46:22,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 463 transitions. [2021-12-18 00:46:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 00:46:22,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:22,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:22,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:22,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:22,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-12-18 00:46:22,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:22,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11845632] [2021-12-18 00:46:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:22,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:46:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 00:46:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:46:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:46:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:46:22,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11845632] [2021-12-18 00:46:22,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11845632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592206139] [2021-12-18 00:46:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:22,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:22,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:22,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:46:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 00:46:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:46:23,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592206139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:23,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-18 00:46:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162716924] [2021-12-18 00:46:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 00:46:23,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 00:46:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:46:23,072 INFO L87 Difference]: Start difference. First operand 277 states and 463 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:23,095 INFO L93 Difference]: Finished difference Result 544 states and 1027 transitions. [2021-12-18 00:46:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 00:46:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-18 00:46:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:23,097 INFO L225 Difference]: With dead ends: 544 [2021-12-18 00:46:23,098 INFO L226 Difference]: Without dead ends: 314 [2021-12-18 00:46:23,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:46:23,100 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:23,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:46:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-18 00:46:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2021-12-18 00:46:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 201 states have (on average 1.318407960199005) internal successors, (265), 210 states have internal predecessors, (265), 47 states have call successors, (47), 15 states have call predecessors, (47), 22 states have return successors, (143), 45 states have call predecessors, (143), 45 states have call successors, (143) [2021-12-18 00:46:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 455 transitions. [2021-12-18 00:46:23,116 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 455 transitions. Word has length 73 [2021-12-18 00:46:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:23,116 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 455 transitions. [2021-12-18 00:46:23,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:46:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 455 transitions. [2021-12-18 00:46:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 00:46:23,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:23,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:23,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:23,335 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2021-12-18 00:46:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:23,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517348653] [2021-12-18 00:46:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:23,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 00:46:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:46:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:46:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:46:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:46:23,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517348653] [2021-12-18 00:46:23,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517348653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201399496] [2021-12-18 00:46:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:23,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:23,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:23,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:46:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:23,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 00:46:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:23,651 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:23,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:23,660 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:23,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 00:46:24,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:46:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201399496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:46:24,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:46:24,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2021-12-18 00:46:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071567433] [2021-12-18 00:46:24,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:46:24,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:46:24,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:24,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:46:24,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-12-18 00:46:24,917 INFO L87 Difference]: Start difference. First operand 271 states and 455 transitions. Second operand has 26 states, 25 states have (on average 4.64) internal successors, (116), 23 states have internal predecessors, (116), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-18 00:46:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:25,710 INFO L93 Difference]: Finished difference Result 689 states and 1407 transitions. [2021-12-18 00:46:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 00:46:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.64) internal successors, (116), 23 states have internal predecessors, (116), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) Word has length 81 [2021-12-18 00:46:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:25,714 INFO L225 Difference]: With dead ends: 689 [2021-12-18 00:46:25,715 INFO L226 Difference]: Without dead ends: 470 [2021-12-18 00:46:25,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=2153, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 00:46:25,718 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 150 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:25,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1208 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 520 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2021-12-18 00:46:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-18 00:46:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 404. [2021-12-18 00:46:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 290 states have (on average 1.313793103448276) internal successors, (381), 309 states have internal predecessors, (381), 75 states have call successors, (75), 21 states have call predecessors, (75), 38 states have return successors, (305), 73 states have call predecessors, (305), 73 states have call successors, (305) [2021-12-18 00:46:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 761 transitions. [2021-12-18 00:46:25,746 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 761 transitions. Word has length 81 [2021-12-18 00:46:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 761 transitions. [2021-12-18 00:46:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.64) internal successors, (116), 23 states have internal predecessors, (116), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-18 00:46:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 761 transitions. [2021-12-18 00:46:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:46:25,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:25,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:25,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:25,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:25,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1698868980, now seen corresponding path program 1 times [2021-12-18 00:46:25,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630230252] [2021-12-18 00:46:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:25,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 00:46:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 00:46:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:46:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:46:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 00:46:26,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630230252] [2021-12-18 00:46:26,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630230252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290909209] [2021-12-18 00:46:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:26,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:26,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:26,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:26,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:46:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 00:46:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:26,285 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:26,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:26,294 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:27,237 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-18 00:46:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:46:27,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:46:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 00:46:27,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290909209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:46:27,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:46:27,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2021-12-18 00:46:27,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053684182] [2021-12-18 00:46:27,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:46:27,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:46:27,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:46:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2021-12-18 00:46:27,576 INFO L87 Difference]: Start difference. First operand 404 states and 761 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:46:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:28,047 INFO L93 Difference]: Finished difference Result 978 states and 2157 transitions. [2021-12-18 00:46:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:46:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2021-12-18 00:46:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:28,054 INFO L225 Difference]: With dead ends: 978 [2021-12-18 00:46:28,054 INFO L226 Difference]: Without dead ends: 618 [2021-12-18 00:46:28,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2021-12-18 00:46:28,061 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 178 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:28,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 691 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 444 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-12-18 00:46:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-12-18 00:46:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 453. [2021-12-18 00:46:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 331 states have (on average 1.3262839879154078) internal successors, (439), 354 states have internal predecessors, (439), 78 states have call successors, (78), 22 states have call predecessors, (78), 43 states have return successors, (339), 76 states have call predecessors, (339), 76 states have call successors, (339) [2021-12-18 00:46:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 856 transitions. [2021-12-18 00:46:28,141 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 856 transitions. Word has length 83 [2021-12-18 00:46:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 856 transitions. [2021-12-18 00:46:28,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:46:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 856 transitions. [2021-12-18 00:46:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 00:46:28,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:28,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:28,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:28,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-18 00:46:28,362 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1637553800, now seen corresponding path program 1 times [2021-12-18 00:46:28,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925556309] [2021-12-18 00:46:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:28,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:46:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:46:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:46:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:46:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:46:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 00:46:28,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925556309] [2021-12-18 00:46:28,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925556309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796911885] [2021-12-18 00:46:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:28,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:28,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:28,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:46:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:46:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 00:46:28,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:28,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796911885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:28,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:28,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:46:28,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54562908] [2021-12-18 00:46:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:28,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:46:28,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:46:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:46:28,754 INFO L87 Difference]: Start difference. First operand 453 states and 856 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:46:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:28,795 INFO L93 Difference]: Finished difference Result 783 states and 1480 transitions. [2021-12-18 00:46:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:46:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-18 00:46:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:28,800 INFO L225 Difference]: With dead ends: 783 [2021-12-18 00:46:28,800 INFO L226 Difference]: Without dead ends: 437 [2021-12-18 00:46:28,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:46:28,804 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:28,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:46:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-18 00:46:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2021-12-18 00:46:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 315 states have (on average 1.3015873015873016) internal successors, (410), 338 states have internal predecessors, (410), 78 states have call successors, (78), 22 states have call predecessors, (78), 43 states have return successors, (339), 76 states have call predecessors, (339), 76 states have call successors, (339) [2021-12-18 00:46:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 827 transitions. [2021-12-18 00:46:28,830 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 827 transitions. Word has length 85 [2021-12-18 00:46:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:28,831 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 827 transitions. [2021-12-18 00:46:28,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:46:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 827 transitions. [2021-12-18 00:46:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 00:46:28,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:28,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:28,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:29,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 00:46:29,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash 324020858, now seen corresponding path program 1 times [2021-12-18 00:46:29,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:29,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972694272] [2021-12-18 00:46:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:29,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:46:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:46:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:46:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:46:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:46:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 00:46:29,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:29,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972694272] [2021-12-18 00:46:29,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972694272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:29,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717531481] [2021-12-18 00:46:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:29,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:29,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:29,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:29,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:46:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:46:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 00:46:29,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:29,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717531481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:29,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:29,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:46:29,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030069224] [2021-12-18 00:46:29,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:29,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:46:29,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:46:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:46:29,484 INFO L87 Difference]: Start difference. First operand 437 states and 827 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:46:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:29,513 INFO L93 Difference]: Finished difference Result 645 states and 1264 transitions. [2021-12-18 00:46:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:46:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-18 00:46:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:29,515 INFO L225 Difference]: With dead ends: 645 [2021-12-18 00:46:29,515 INFO L226 Difference]: Without dead ends: 235 [2021-12-18 00:46:29,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:46:29,520 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:29,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:46:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-18 00:46:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 184. [2021-12-18 00:46:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 135 states have (on average 1.2) internal successors, (162), 143 states have internal predecessors, (162), 29 states have call successors, (29), 13 states have call predecessors, (29), 19 states have return successors, (63), 27 states have call predecessors, (63), 28 states have call successors, (63) [2021-12-18 00:46:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2021-12-18 00:46:29,531 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 85 [2021-12-18 00:46:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:29,531 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2021-12-18 00:46:29,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:46:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2021-12-18 00:46:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 00:46:29,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:29,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:29,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:29,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-18 00:46:29,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 806524548, now seen corresponding path program 1 times [2021-12-18 00:46:29,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950440602] [2021-12-18 00:46:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:29,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:46:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:46:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:46:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:46:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:46:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 00:46:29,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:29,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950440602] [2021-12-18 00:46:29,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950440602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721357884] [2021-12-18 00:46:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:29,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:29,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:29,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:29,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:46:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 00:46:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:46:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:30,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:46:30,254 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-18 00:46:30,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-12-18 00:46:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-18 00:46:30,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-18 00:46:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:46:30,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-18 00:46:30,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:46:32,311 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_28| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_28|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_28|)) is different from true [2021-12-18 00:46:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:46:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:46:46,997 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_999 (Array Int Int)) (v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_999) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1000) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1002)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2021-12-18 00:46:47,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:46:47,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-18 00:46:47,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:46:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 306 treesize of output 284 [2021-12-18 00:46:47,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2021-12-18 00:46:47,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2021-12-18 00:46:47,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 00:46:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-18 00:46:47,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:46:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 60 [2021-12-18 00:46:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2021-12-18 00:46:47,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721357884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:46:47,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:46:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2021-12-18 00:46:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736180717] [2021-12-18 00:46:47,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:46:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:46:47,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:46:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=488, Unknown=3, NotChecked=90, Total=650 [2021-12-18 00:46:47,313 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-18 00:46:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:54,235 INFO L93 Difference]: Finished difference Result 411 states and 587 transitions. [2021-12-18 00:46:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 00:46:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 86 [2021-12-18 00:46:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:54,237 INFO L225 Difference]: With dead ends: 411 [2021-12-18 00:46:54,237 INFO L226 Difference]: Without dead ends: 214 [2021-12-18 00:46:54,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=157, Invalid=1180, Unknown=3, NotChecked=142, Total=1482 [2021-12-18 00:46:54,238 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 126 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:54,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1438 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1079 Invalid, 0 Unknown, 658 Unchecked, 0.6s Time] [2021-12-18 00:46:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-18 00:46:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 176. [2021-12-18 00:46:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 130 states have (on average 1.2) internal successors, (156), 136 states have internal predecessors, (156), 29 states have call successors, (29), 12 states have call predecessors, (29), 16 states have return successors, (54), 27 states have call predecessors, (54), 28 states have call successors, (54) [2021-12-18 00:46:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 239 transitions. [2021-12-18 00:46:54,249 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 239 transitions. Word has length 86 [2021-12-18 00:46:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:54,250 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 239 transitions. [2021-12-18 00:46:54,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-18 00:46:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 239 transitions. [2021-12-18 00:46:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-18 00:46:54,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:54,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-18 00:46:54,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 00:46:54,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash -216003458, now seen corresponding path program 1 times [2021-12-18 00:46:54,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:54,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480877193] [2021-12-18 00:46:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:54,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:46:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:46:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:46:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:46:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-18 00:46:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-18 00:46:54,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:54,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480877193] [2021-12-18 00:46:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480877193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:54,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997232838] [2021-12-18 00:46:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:54,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:54,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:54,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:46:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 00:46:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 00:46:54,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:46:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997232838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:46:54,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:46:54,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-18 00:46:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609624776] [2021-12-18 00:46:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:46:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:46:54,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:46:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:46:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:46:54,905 INFO L87 Difference]: Start difference. First operand 176 states and 239 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 00:46:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:46:55,063 INFO L93 Difference]: Finished difference Result 267 states and 363 transitions. [2021-12-18 00:46:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:46:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 90 [2021-12-18 00:46:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:46:55,065 INFO L225 Difference]: With dead ends: 267 [2021-12-18 00:46:55,065 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 00:46:55,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:46:55,066 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 107 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:46:55,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 295 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:46:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 00:46:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-18 00:46:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.1875) internal successors, (152), 133 states have internal predecessors, (152), 29 states have call successors, (29), 12 states have call predecessors, (29), 15 states have return successors, (49), 27 states have call predecessors, (49), 28 states have call successors, (49) [2021-12-18 00:46:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 230 transitions. [2021-12-18 00:46:55,074 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 230 transitions. Word has length 90 [2021-12-18 00:46:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:46:55,074 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 230 transitions. [2021-12-18 00:46:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-18 00:46:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 230 transitions. [2021-12-18 00:46:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 00:46:55,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:46:55,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:46:55,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:46:55,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 00:46:55,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:46:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:46:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1613305023, now seen corresponding path program 1 times [2021-12-18 00:46:55,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:46:55,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045440010] [2021-12-18 00:46:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:55,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:46:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:46:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:46:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:46:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:46:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:46:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:46:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:46:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 00:46:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-18 00:46:55,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:46:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045440010] [2021-12-18 00:46:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045440010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:46:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500260724] [2021-12-18 00:46:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:46:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:46:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:46:55,468 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:46:55,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 00:46:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:46:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 00:46:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:46:55,653 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:55,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:55,661 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:46:55,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:46:57,825 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_6| 24)) 0)))) is different from true [2021-12-18 00:46:59,896 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_10| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_10| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_10| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_10| 24)) 0)))) is different from true [2021-12-18 00:47:01,962 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_11| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_11|) (+ |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_11| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_11| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_11|) (+ |v_ULTIMATE.start_aws_linked_list_end_~list#1.offset_BEFORE_CALL_11| 24)) 0)))) is different from true [2021-12-18 00:47:10,036 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:47:18,165 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:47:26,311 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:47:32,365 WARN L227 SmtUtils]: Spent 6.02s 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) [2021-12-18 00:47:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 00:47:32,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:47:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 00:47:34,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500260724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:47:34,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:47:34,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 11] total 27 [2021-12-18 00:47:34,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940429137] [2021-12-18 00:47:34,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:47:34,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 00:47:34,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:47:34,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 00:47:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=481, Unknown=7, NotChecked=138, Total=702 [2021-12-18 00:47:34,900 INFO L87 Difference]: Start difference. First operand 173 states and 230 transitions. Second operand has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-18 00:47:59,588 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:48:07,636 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:48:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:48:07,908 INFO L93 Difference]: Finished difference Result 301 states and 403 transitions. [2021-12-18 00:48:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 00:48:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 97 [2021-12-18 00:48:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:48:07,919 INFO L225 Difference]: With dead ends: 301 [2021-12-18 00:48:07,919 INFO L226 Difference]: Without dead ends: 221 [2021-12-18 00:48:07,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=272, Invalid=1703, Unknown=17, NotChecked=264, Total=2256 [2021-12-18 00:48:07,920 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 98 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:48:07,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 821 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 620 Invalid, 0 Unknown, 443 Unchecked, 0.3s Time] [2021-12-18 00:48:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-18 00:48:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2021-12-18 00:48:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 147 states have (on average 1.1904761904761905) internal successors, (175), 153 states have internal predecessors, (175), 29 states have call successors, (29), 14 states have call predecessors, (29), 18 states have return successors, (48), 27 states have call predecessors, (48), 28 states have call successors, (48) [2021-12-18 00:48:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 252 transitions. [2021-12-18 00:48:07,932 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 252 transitions. Word has length 97 [2021-12-18 00:48:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:48:07,932 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 252 transitions. [2021-12-18 00:48:07,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-18 00:48:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 252 transitions. [2021-12-18 00:48:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 00:48:07,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:48:07,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:48:07,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:48:08,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 00:48:08,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:48:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:48:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2021-12-18 00:48:08,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:48:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292207589] [2021-12-18 00:48:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:48:08,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:48:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:48:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:48:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:48:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:48:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:48:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:48:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:48:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:48:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:48:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 00:48:08,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:48:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292207589] [2021-12-18 00:48:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292207589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:48:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759126449] [2021-12-18 00:48:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:48:08,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:48:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:48:08,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:48:08,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 00:48:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:48:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:48:08,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:48:08,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:48:08,838 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:48:08,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:48:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 00:48:09,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:48:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 00:48:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759126449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:48:10,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:48:10,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 12] total 37 [2021-12-18 00:48:10,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883605894] [2021-12-18 00:48:10,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:48:10,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 00:48:10,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:48:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 00:48:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 00:48:10,351 INFO L87 Difference]: Start difference. First operand 195 states and 252 transitions. Second operand has 37 states, 37 states have (on average 4.216216216216216) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-18 00:48:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:48:11,249 INFO L93 Difference]: Finished difference Result 336 states and 428 transitions. [2021-12-18 00:48:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 00:48:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.216216216216216) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) Word has length 100 [2021-12-18 00:48:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:48:11,251 INFO L225 Difference]: With dead ends: 336 [2021-12-18 00:48:11,251 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 00:48:11,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 198 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=2524, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 00:48:11,252 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 272 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:48:11,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1282 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 348 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2021-12-18 00:48:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 00:48:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 234. [2021-12-18 00:48:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 181 states have (on average 1.2044198895027625) internal successors, (218), 187 states have internal predecessors, (218), 31 states have call successors, (31), 17 states have call predecessors, (31), 21 states have return successors, (43), 29 states have call predecessors, (43), 30 states have call successors, (43) [2021-12-18 00:48:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-12-18 00:48:11,264 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 100 [2021-12-18 00:48:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:48:11,264 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-12-18 00:48:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.216216216216216) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 11 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-18 00:48:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-12-18 00:48:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 00:48:11,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:48:11,266 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:48:11,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 00:48:11,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:48:11,484 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:48:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:48:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1776908920, now seen corresponding path program 1 times [2021-12-18 00:48:11,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:48:11,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736067927] [2021-12-18 00:48:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:48:11,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:48:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:48:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:48:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:48:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:48:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:48:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:48:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:48:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:48:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:48:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 00:48:11,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:48:11,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736067927] [2021-12-18 00:48:11,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736067927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:48:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635675731] [2021-12-18 00:48:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:48:11,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:48:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:48:11,731 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:48:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 00:48:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:48:11,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 00:48:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:48:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:48:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:48:12,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:48:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:48:12,093 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-18 00:48:12,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2021-12-18 00:48:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:48:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:48:12,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2021-12-18 00:48:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:48:12,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-12-18 00:48:14,180 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_45| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_45|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_45|)) is different from true [2021-12-18 00:48:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 00:48:32,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:48:34,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1483 Int) (v_ArrVal_1481 (Array Int Int)) (v_ArrVal_1480 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1481) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1480) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1483)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2021-12-18 00:48:34,930 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| Int) (v_ArrVal_1478 (Array Int Int)) (v_ArrVal_1483 Int) (v_ArrVal_1481 (Array Int Int)) (v_ArrVal_1480 (Array Int Int))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1478))) (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_ArrVal_1481) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_ArrVal_1480) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1483))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))))) is different from false [2021-12-18 00:48:34,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:48:34,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2021-12-18 00:48:34,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:48:34,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 888 treesize of output 824 [2021-12-18 00:48:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 898 treesize of output 880 [2021-12-18 00:48:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1088 treesize of output 1056 [2021-12-18 00:48:35,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1056 treesize of output 1052 [2021-12-18 00:48:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:48:35,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:48:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2021-12-18 00:48:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 34 trivial. 4 not checked. [2021-12-18 00:48:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635675731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:48:35,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:48:35,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 36 [2021-12-18 00:48:35,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859493607] [2021-12-18 00:48:35,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:48:35,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 00:48:35,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:48:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 00:48:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=954, Unknown=7, NotChecked=192, Total=1260 [2021-12-18 00:48:35,401 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 35 states have internal predecessors, (167), 12 states have call successors, (27), 3 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-18 00:50:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:50:00,823 INFO L93 Difference]: Finished difference Result 586 states and 739 transitions. [2021-12-18 00:50:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 00:50:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 35 states have internal predecessors, (167), 12 states have call successors, (27), 3 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) Word has length 104 [2021-12-18 00:50:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:50:00,826 INFO L225 Difference]: With dead ends: 586 [2021-12-18 00:50:00,826 INFO L226 Difference]: Without dead ends: 405 [2021-12-18 00:50:00,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 107.2s TimeCoverageRelationStatistics Valid=333, Invalid=3176, Unknown=43, NotChecked=354, Total=3906 [2021-12-18 00:50:00,828 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 295 mSDsluCounter, 2312 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1367 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:50:00,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2461 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1165 Invalid, 0 Unknown, 1367 Unchecked, 0.7s Time] [2021-12-18 00:50:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-18 00:50:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 254. [2021-12-18 00:50:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 203 states have (on average 1.2167487684729064) internal successors, (247), 208 states have internal predecessors, (247), 29 states have call successors, (29), 18 states have call predecessors, (29), 21 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-18 00:50:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 315 transitions. [2021-12-18 00:50:00,845 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 315 transitions. Word has length 104 [2021-12-18 00:50:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:50:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 315 transitions. [2021-12-18 00:50:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 35 states have internal predecessors, (167), 12 states have call successors, (27), 3 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-18 00:50:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 315 transitions. [2021-12-18 00:50:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 00:50:00,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:50:00,846 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:50:00,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 00:50:01,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 00:50:01,064 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:50:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:50:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2021-12-18 00:50:01,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:50:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939089674] [2021-12-18 00:50:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:50:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:50:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:50:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:50:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:50:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:50:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:50:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:50:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:50:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-18 00:50:01,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:50:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939089674] [2021-12-18 00:50:01,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939089674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:50:01,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:50:01,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 00:50:01,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639391361] [2021-12-18 00:50:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:50:01,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:50:01,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:50:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:50:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:50:01,213 INFO L87 Difference]: Start difference. First operand 254 states and 315 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:50:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:50:01,249 INFO L93 Difference]: Finished difference Result 551 states and 702 transitions. [2021-12-18 00:50:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:50:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2021-12-18 00:50:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:50:01,251 INFO L225 Difference]: With dead ends: 551 [2021-12-18 00:50:01,251 INFO L226 Difference]: Without dead ends: 243 [2021-12-18 00:50:01,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:50:01,252 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 45 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:50:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 320 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:50:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-18 00:50:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-12-18 00:50:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 192 states have (on average 1.1875) internal successors, (228), 197 states have internal predecessors, (228), 29 states have call successors, (29), 18 states have call predecessors, (29), 21 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-18 00:50:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 296 transitions. [2021-12-18 00:50:01,263 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 296 transitions. Word has length 100 [2021-12-18 00:50:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:50:01,263 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 296 transitions. [2021-12-18 00:50:01,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:50:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 296 transitions. [2021-12-18 00:50:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-18 00:50:01,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:50:01,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:50:01,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 00:50:01,265 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:50:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:50:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1748424695, now seen corresponding path program 1 times [2021-12-18 00:50:01,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:50:01,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231210085] [2021-12-18 00:50:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:50:01,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:50:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:50:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:50:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:50:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:50:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:50:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:50:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 00:50:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:50:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 00:50:01,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:50:01,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231210085] [2021-12-18 00:50:01,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231210085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:50:01,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354951539] [2021-12-18 00:50:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:50:01,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:50:01,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:50:01,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:50:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 00:50:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:01,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 00:50:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:50:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 00:50:01,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:50:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354951539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:50:01,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:50:01,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-12-18 00:50:01,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129367744] [2021-12-18 00:50:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:50:01,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:50:01,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:50:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:50:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:50:01,893 INFO L87 Difference]: Start difference. First operand 243 states and 296 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-18 00:50:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:50:02,025 INFO L93 Difference]: Finished difference Result 462 states and 578 transitions. [2021-12-18 00:50:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:50:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 112 [2021-12-18 00:50:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:50:02,027 INFO L225 Difference]: With dead ends: 462 [2021-12-18 00:50:02,028 INFO L226 Difference]: Without dead ends: 276 [2021-12-18 00:50:02,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:50:02,029 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 17 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:50:02,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 458 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-12-18 00:50:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-18 00:50:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 247. [2021-12-18 00:50:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 196 states have (on average 1.1887755102040816) internal successors, (233), 199 states have internal predecessors, (233), 29 states have call successors, (29), 18 states have call predecessors, (29), 21 states have return successors, (39), 29 states have call predecessors, (39), 28 states have call successors, (39) [2021-12-18 00:50:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 301 transitions. [2021-12-18 00:50:02,042 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 301 transitions. Word has length 112 [2021-12-18 00:50:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:50:02,042 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 301 transitions. [2021-12-18 00:50:02,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-18 00:50:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 301 transitions. [2021-12-18 00:50:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-18 00:50:02,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:50:02,043 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:50:02,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 00:50:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 00:50:02,260 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:50:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:50:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1814575175, now seen corresponding path program 1 times [2021-12-18 00:50:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:50:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806292580] [2021-12-18 00:50:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:50:02,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:50:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:50:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:50:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:50:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:50:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:50:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:50:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:50:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 00:50:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:50:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-18 00:50:02,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:50:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806292580] [2021-12-18 00:50:02,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806292580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:50:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932912088] [2021-12-18 00:50:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:50:02,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:50:02,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:50:02,488 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:50:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 00:50:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:50:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 00:50:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:50:02,852 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:50:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:50:02,864 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:50:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:50:05,020 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_13|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_13|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_13| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_13|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_13| 16))))) is different from true [2021-12-18 00:50:07,186 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|) 0) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|) 0) 16)))) is different from true [2021-12-18 00:50:09,272 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|) 0) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|) 0) 16)))) is different from true [2021-12-18 00:50:19,339 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:50:33,459 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:50:43,527 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:50:51,623 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:51:01,748 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:51:09,815 WARN L227 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:51:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-12-18 00:51:09,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:51:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 00:51:12,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932912088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:51:12,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:51:12,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 14] total 40 [2021-12-18 00:51:12,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50428445] [2021-12-18 00:51:12,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:51:12,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 00:51:12,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:51:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 00:51:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1192, Unknown=10, NotChecked=216, Total=1560 [2021-12-18 00:51:12,683 INFO L87 Difference]: Start difference. First operand 247 states and 301 transitions. Second operand has 40 states, 37 states have (on average 4.918918918918919) internal successors, (182), 38 states have internal predecessors, (182), 16 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) [2021-12-18 00:51:55,293 WARN L860 $PredicateComparison]: unable to prove that (and (or (not (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) |c_aws_linked_list_is_valid_#in~list#1.base|)) (not (= (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|) (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 16)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|) 0) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_21|) 0) 16))))) is different from true [2021-12-18 00:52:07,350 WARN L227 SmtUtils]: Spent 8.02s 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) [2021-12-18 00:52:17,391 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:52:37,424 WARN L227 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:52:47,455 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:54:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:54:37,373 INFO L93 Difference]: Finished difference Result 712 states and 940 transitions. [2021-12-18 00:54:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 00:54:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 4.918918918918919) internal successors, (182), 38 states have internal predecessors, (182), 16 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) Word has length 112 [2021-12-18 00:54:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:54:37,377 INFO L225 Difference]: With dead ends: 712 [2021-12-18 00:54:37,377 INFO L226 Difference]: Without dead ends: 510 [2021-12-18 00:54:37,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 272.2s TimeCoverageRelationStatistics Valid=712, Invalid=5529, Unknown=95, NotChecked=636, Total=6972 [2021-12-18 00:54:37,379 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 386 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 4310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1595 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:54:37,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 2122 Invalid, 4310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2491 Invalid, 0 Unknown, 1595 Unchecked, 1.3s Time] [2021-12-18 00:54:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-18 00:54:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 409. [2021-12-18 00:54:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 329 states have (on average 1.1914893617021276) internal successors, (392), 329 states have internal predecessors, (392), 47 states have call successors, (47), 25 states have call predecessors, (47), 32 states have return successors, (83), 54 states have call predecessors, (83), 46 states have call successors, (83) [2021-12-18 00:54:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 522 transitions. [2021-12-18 00:54:37,410 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 522 transitions. Word has length 112 [2021-12-18 00:54:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:54:37,410 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 522 transitions. [2021-12-18 00:54:37,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 4.918918918918919) internal successors, (182), 38 states have internal predecessors, (182), 16 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) [2021-12-18 00:54:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 522 transitions. [2021-12-18 00:54:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 00:54:37,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:54:37,412 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:54:37,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 00:54:37,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:54:37,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:54:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:54:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2021-12-18 00:54:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:54:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376159115] [2021-12-18 00:54:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:54:37,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:54:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:54:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:54:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:54:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:54:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:54:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:54:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:54:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:54:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:54:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:38,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:54:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:54:38,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:54:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376159115] [2021-12-18 00:54:38,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376159115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:54:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953222460] [2021-12-18 00:54:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:54:38,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:54:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:54:38,164 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:54:38,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 00:54:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:54:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 167 conjunts are in the unsatisfiable core [2021-12-18 00:54:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:54:38,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:54:38,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:54:38,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:54:38,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:54:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 00:54:40,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:54:51,943 WARN L227 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:55:02,320 WARN L227 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:55:03,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:55:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 9424 treesize of output 8532 [2021-12-18 00:55:03,622 INFO L354 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2021-12-18 00:55:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 93435 treesize of output 86466 [2021-12-18 00:55:04,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:55:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 94768 treesize of output 93766 [2021-12-18 00:55:05,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:55:05,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112553 treesize of output 108168 [2021-12-18 00:55:10,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:55:10,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102677 treesize of output 98424 [2021-12-18 00:55:10,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:55:10,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 98114 treesize of output 97603 [2021-12-18 00:55:12,030 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 00:55:12,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:55:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-18 00:55:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092594592] [2021-12-18 00:55:12,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:55:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:55:12,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:55:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3279, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 00:55:12,033 INFO L87 Difference]: Start difference. First operand 409 states and 522 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 00:55:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:13,006 INFO L93 Difference]: Finished difference Result 616 states and 829 transitions. [2021-12-18 00:55:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 00:55:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 113 [2021-12-18 00:55:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:13,009 INFO L225 Difference]: With dead ends: 616 [2021-12-18 00:55:13,009 INFO L226 Difference]: Without dead ends: 495 [2021-12-18 00:55:13,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=380, Invalid=4590, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 00:55:13,010 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 128 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:13,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 746 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 00:55:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-18 00:55:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 420. [2021-12-18 00:55:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 338 states have (on average 1.1893491124260356) internal successors, (402), 336 states have internal predecessors, (402), 47 states have call successors, (47), 25 states have call predecessors, (47), 34 states have return successors, (97), 58 states have call predecessors, (97), 46 states have call successors, (97) [2021-12-18 00:55:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 546 transitions. [2021-12-18 00:55:13,036 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 546 transitions. Word has length 113 [2021-12-18 00:55:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:13,036 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 546 transitions. [2021-12-18 00:55:13,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 16 states have internal predecessors, (70), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 00:55:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 546 transitions. [2021-12-18 00:55:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 00:55:13,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:13,038 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:13,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 00:55:13,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:13,251 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1807516699, now seen corresponding path program 1 times [2021-12-18 00:55:13,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:13,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133061199] [2021-12-18 00:55:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:13,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:55:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:55:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 00:55:13,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133061199] [2021-12-18 00:55:13,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133061199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103755939] [2021-12-18 00:55:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:13,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:13,536 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:13,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 00:55:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 00:55:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:13,825 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:55:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:55:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 00:55:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:55:15,289 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 121 treesize of output 113 [2021-12-18 00:55:15,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 105 [2021-12-18 00:55:15,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2021-12-18 00:55:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 00:55:15,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103755939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:55:15,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:55:15,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 19] total 43 [2021-12-18 00:55:15,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132186634] [2021-12-18 00:55:15,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:55:15,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 00:55:15,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 00:55:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 00:55:15,362 INFO L87 Difference]: Start difference. First operand 420 states and 546 transitions. Second operand has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-18 00:55:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:16,910 INFO L93 Difference]: Finished difference Result 938 states and 1295 transitions. [2021-12-18 00:55:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 00:55:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) Word has length 113 [2021-12-18 00:55:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:16,941 INFO L225 Difference]: With dead ends: 938 [2021-12-18 00:55:16,941 INFO L226 Difference]: Without dead ends: 767 [2021-12-18 00:55:16,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 221 SyntacticMatches, 17 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=508, Invalid=4748, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 00:55:16,944 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 341 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:16,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 2529 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1459 Invalid, 0 Unknown, 757 Unchecked, 0.8s Time] [2021-12-18 00:55:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-18 00:55:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 577. [2021-12-18 00:55:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 457 states have (on average 1.1925601750547046) internal successors, (545), 461 states have internal predecessors, (545), 67 states have call successors, (67), 32 states have call predecessors, (67), 52 states have return successors, (147), 83 states have call predecessors, (147), 66 states have call successors, (147) [2021-12-18 00:55:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 759 transitions. [2021-12-18 00:55:17,010 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 759 transitions. Word has length 113 [2021-12-18 00:55:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:17,010 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 759 transitions. [2021-12-18 00:55:17,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 41 states have internal predecessors, (171), 17 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (25), 15 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-18 00:55:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 759 transitions. [2021-12-18 00:55:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 00:55:17,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:17,012 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:17,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 00:55:17,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:17,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1476333347, now seen corresponding path program 1 times [2021-12-18 00:55:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763122614] [2021-12-18 00:55:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:17,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:55:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:55:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-18 00:55:17,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763122614] [2021-12-18 00:55:17,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763122614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:17,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:55:17,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:55:17,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250344776] [2021-12-18 00:55:17,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:17,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:55:17,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:55:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:55:17,395 INFO L87 Difference]: Start difference. First operand 577 states and 759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-18 00:55:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:17,464 INFO L93 Difference]: Finished difference Result 1155 states and 1557 transitions. [2021-12-18 00:55:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:55:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 113 [2021-12-18 00:55:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:17,467 INFO L225 Difference]: With dead ends: 1155 [2021-12-18 00:55:17,467 INFO L226 Difference]: Without dead ends: 591 [2021-12-18 00:55:17,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:55:17,469 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 21 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:17,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 413 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:55:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-12-18 00:55:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 553. [2021-12-18 00:55:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 437 states have (on average 1.162471395881007) internal successors, (508), 441 states have internal predecessors, (508), 67 states have call successors, (67), 32 states have call predecessors, (67), 48 states have return successors, (113), 79 states have call predecessors, (113), 66 states have call successors, (113) [2021-12-18 00:55:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 688 transitions. [2021-12-18 00:55:17,503 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 688 transitions. Word has length 113 [2021-12-18 00:55:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:17,504 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 688 transitions. [2021-12-18 00:55:17,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-18 00:55:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 688 transitions. [2021-12-18 00:55:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:55:17,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:17,505 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:17,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 00:55:17,506 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1112769404, now seen corresponding path program 1 times [2021-12-18 00:55:17,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011635531] [2021-12-18 00:55:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:17,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:55:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:55:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-18 00:55:17,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011635531] [2021-12-18 00:55:17,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011635531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:17,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:55:17,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:55:17,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18676036] [2021-12-18 00:55:17,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:55:17,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:55:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:55:17,655 INFO L87 Difference]: Start difference. First operand 553 states and 688 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 00:55:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:17,735 INFO L93 Difference]: Finished difference Result 605 states and 757 transitions. [2021-12-18 00:55:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:55:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 116 [2021-12-18 00:55:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:17,737 INFO L225 Difference]: With dead ends: 605 [2021-12-18 00:55:17,737 INFO L226 Difference]: Without dead ends: 603 [2021-12-18 00:55:17,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:55:17,738 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 10 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:17,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 562 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:55:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-12-18 00:55:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 574. [2021-12-18 00:55:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.158129175946548) internal successors, (520), 456 states have internal predecessors, (520), 72 states have call successors, (72), 33 states have call predecessors, (72), 52 states have return successors, (128), 84 states have call predecessors, (128), 71 states have call successors, (128) [2021-12-18 00:55:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 720 transitions. [2021-12-18 00:55:17,774 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 720 transitions. Word has length 116 [2021-12-18 00:55:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:17,775 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 720 transitions. [2021-12-18 00:55:17,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 00:55:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 720 transitions. [2021-12-18 00:55:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 00:55:17,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:17,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:17,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 00:55:17,777 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:17,778 INFO L85 PathProgramCache]: Analyzing trace with hash -948416556, now seen corresponding path program 1 times [2021-12-18 00:55:17,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:17,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160713219] [2021-12-18 00:55:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:17,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:55:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:55:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:55:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:55:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:55:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:55:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:55:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 00:55:17,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:17,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160713219] [2021-12-18 00:55:17,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160713219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:17,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599874331] [2021-12-18 00:55:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:17,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:17,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:17,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 00:55:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 00:55:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:18,197 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:55:18,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:55:18,205 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:55:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:55:19,979 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_28| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_28| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_28|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_28|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_28| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_28| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_28|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_28|) 0)))) is different from true [2021-12-18 00:55:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 42 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 14 not checked. [2021-12-18 00:55:20,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:55:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-18 00:55:21,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599874331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:55:21,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:55:21,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 13] total 33 [2021-12-18 00:55:21,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566015777] [2021-12-18 00:55:21,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:55:21,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 00:55:21,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 00:55:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=901, Unknown=1, NotChecked=60, Total=1056 [2021-12-18 00:55:21,482 INFO L87 Difference]: Start difference. First operand 574 states and 720 transitions. Second operand has 33 states, 32 states have (on average 4.90625) internal successors, (157), 30 states have internal predecessors, (157), 14 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-18 00:55:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:22,761 INFO L93 Difference]: Finished difference Result 902 states and 1127 transitions. [2021-12-18 00:55:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 00:55:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.90625) internal successors, (157), 30 states have internal predecessors, (157), 14 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 122 [2021-12-18 00:55:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:22,766 INFO L225 Difference]: With dead ends: 902 [2021-12-18 00:55:22,766 INFO L226 Difference]: Without dead ends: 625 [2021-12-18 00:55:22,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 245 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=472, Invalid=3953, Unknown=1, NotChecked=130, Total=4556 [2021-12-18 00:55:22,768 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 225 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:22,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1607 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 669 Invalid, 0 Unknown, 448 Unchecked, 0.3s Time] [2021-12-18 00:55:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-18 00:55:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 556. [2021-12-18 00:55:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 433 states have (on average 1.1547344110854503) internal successors, (500), 440 states have internal predecessors, (500), 72 states have call successors, (72), 32 states have call predecessors, (72), 50 states have return successors, (125), 83 states have call predecessors, (125), 71 states have call successors, (125) [2021-12-18 00:55:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 697 transitions. [2021-12-18 00:55:22,858 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 697 transitions. Word has length 122 [2021-12-18 00:55:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:22,858 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 697 transitions. [2021-12-18 00:55:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.90625) internal successors, (157), 30 states have internal predecessors, (157), 14 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-18 00:55:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 697 transitions. [2021-12-18 00:55:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 00:55:22,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:22,859 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:22,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 00:55:23,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 00:55:23,077 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 610448605, now seen corresponding path program 1 times [2021-12-18 00:55:23,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:23,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110718320] [2021-12-18 00:55:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:23,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:55:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:55:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:55:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-18 00:55:23,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110718320] [2021-12-18 00:55:23,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110718320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:23,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:55:23,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:55:23,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896462329] [2021-12-18 00:55:23,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:23,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:55:23,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:55:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:55:23,226 INFO L87 Difference]: Start difference. First operand 556 states and 697 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 00:55:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:23,271 INFO L93 Difference]: Finished difference Result 562 states and 702 transitions. [2021-12-18 00:55:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:55:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-12-18 00:55:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:23,277 INFO L225 Difference]: With dead ends: 562 [2021-12-18 00:55:23,278 INFO L226 Difference]: Without dead ends: 560 [2021-12-18 00:55:23,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:55:23,279 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:23,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 294 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:55:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-18 00:55:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-12-18 00:55:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 436 states have (on average 1.1536697247706422) internal successors, (503), 443 states have internal predecessors, (503), 72 states have call successors, (72), 33 states have call predecessors, (72), 51 states have return successors, (125), 83 states have call predecessors, (125), 71 states have call successors, (125) [2021-12-18 00:55:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 700 transitions. [2021-12-18 00:55:23,313 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 700 transitions. Word has length 122 [2021-12-18 00:55:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:23,315 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 700 transitions. [2021-12-18 00:55:23,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 00:55:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 700 transitions. [2021-12-18 00:55:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 00:55:23,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:23,318 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:55:23,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 00:55:23,318 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 594113950, now seen corresponding path program 2 times [2021-12-18 00:55:23,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740660680] [2021-12-18 00:55:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:23,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:55:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:55:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:55:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:55:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-18 00:55:23,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740660680] [2021-12-18 00:55:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740660680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841205548] [2021-12-18 00:55:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:55:23,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:23,884 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 00:55:24,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:55:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:55:24,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 00:55:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 00:55:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:55:44,687 WARN L227 SmtUtils]: Spent 14.02s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:55:57,663 WARN L227 SmtUtils]: Spent 12.85s on a formula simplification. DAG size of input: 41 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:56:02,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:56:02,491 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:56:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 1 [2021-12-18 00:56:02,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:56:02,739 INFO L354 Elim1Store]: treesize reduction 4, result has 94.4 percent of original size [2021-12-18 00:56:02,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 95 [2021-12-18 00:56:02,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:56:02,787 INFO L354 Elim1Store]: treesize reduction 13, result has 78.3 percent of original size [2021-12-18 00:56:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 99 [2021-12-18 00:56:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 00:56:03,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841205548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:56:03,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:56:03,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 19] total 56 [2021-12-18 00:56:03,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256873727] [2021-12-18 00:56:03,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:56:03,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 00:56:03,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 00:56:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2866, Unknown=3, NotChecked=0, Total=3080 [2021-12-18 00:56:03,946 INFO L87 Difference]: Start difference. First operand 560 states and 700 transitions. Second operand has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 53 states have internal predecessors, (198), 21 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-18 00:56:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:16,296 INFO L93 Difference]: Finished difference Result 1198 states and 1685 transitions. [2021-12-18 00:56:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 00:56:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 53 states have internal predecessors, (198), 21 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) Word has length 124 [2021-12-18 00:56:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:16,301 INFO L225 Difference]: With dead ends: 1198 [2021-12-18 00:56:16,301 INFO L226 Difference]: Without dead ends: 996 [2021-12-18 00:56:16,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 243 SyntacticMatches, 24 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3272 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=904, Invalid=9804, Unknown=4, NotChecked=0, Total=10712 [2021-12-18 00:56:16,304 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 593 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 4369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1398 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:16,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2480 Invalid, 4369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2663 Invalid, 0 Unknown, 1398 Unchecked, 2.0s Time] [2021-12-18 00:56:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-12-18 00:56:16,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 591. [2021-12-18 00:56:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 460 states have (on average 1.1586956521739131) internal successors, (533), 467 states have internal predecessors, (533), 78 states have call successors, (78), 34 states have call predecessors, (78), 52 states have return successors, (134), 89 states have call predecessors, (134), 77 states have call successors, (134) [2021-12-18 00:56:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 745 transitions. [2021-12-18 00:56:16,393 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 745 transitions. Word has length 124 [2021-12-18 00:56:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:16,395 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 745 transitions. [2021-12-18 00:56:16,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 53 states have internal predecessors, (198), 21 states have call successors, (33), 4 states have call predecessors, (33), 12 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-18 00:56:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 745 transitions. [2021-12-18 00:56:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 00:56:16,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:16,399 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:56:16,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 00:56:16,615 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 852279388, now seen corresponding path program 2 times [2021-12-18 00:56:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469631372] [2021-12-18 00:56:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:16,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:56:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:56:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:56:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:56:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:17,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:17,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:56:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 00:56:17,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:17,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469631372] [2021-12-18 00:56:17,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469631372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708872333] [2021-12-18 00:56:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:56:17,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:17,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:17,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 00:56:17,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:56:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:56:17,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 00:56:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:17,419 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:56:17,435 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:17,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:56:42,700 WARN L227 SmtUtils]: Spent 10.04s 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) [2021-12-18 00:56:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-18 00:56:42,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:56:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 51 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 00:56:43,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708872333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:56:43,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:56:43,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 14] total 40 [2021-12-18 00:56:43,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821686136] [2021-12-18 00:56:43,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:56:43,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 00:56:43,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 00:56:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1372, Unknown=7, NotChecked=0, Total=1560 [2021-12-18 00:56:43,964 INFO L87 Difference]: Start difference. First operand 591 states and 745 transitions. Second operand has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-18 00:56:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:57,048 INFO L93 Difference]: Finished difference Result 752 states and 950 transitions. [2021-12-18 00:56:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 00:56:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) Word has length 124 [2021-12-18 00:56:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:57,052 INFO L225 Difference]: With dead ends: 752 [2021-12-18 00:56:57,052 INFO L226 Difference]: Without dead ends: 659 [2021-12-18 00:56:57,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 242 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=382, Invalid=2467, Unknown=13, NotChecked=0, Total=2862 [2021-12-18 00:56:57,055 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 288 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:57,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 1733 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 826 Invalid, 0 Unknown, 236 Unchecked, 0.6s Time] [2021-12-18 00:56:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-18 00:56:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 589. [2021-12-18 00:56:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 457 states have (on average 1.1444201312910285) internal successors, (523), 467 states have internal predecessors, (523), 78 states have call successors, (78), 35 states have call predecessors, (78), 53 states have return successors, (134), 86 states have call predecessors, (134), 77 states have call successors, (134) [2021-12-18 00:56:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 735 transitions. [2021-12-18 00:56:57,114 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 735 transitions. Word has length 124 [2021-12-18 00:56:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:57,115 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 735 transitions. [2021-12-18 00:56:57,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 38 states have internal predecessors, (183), 19 states have call successors, (32), 4 states have call predecessors, (32), 8 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-18 00:56:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 735 transitions. [2021-12-18 00:56:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-18 00:56:57,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:57,117 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:56:57,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:57,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 00:56:57,339 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1752416183, now seen corresponding path program 1 times [2021-12-18 00:56:57,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772115672] [2021-12-18 00:56:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:57,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:56:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:56:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:56:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:56:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:56:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-18 00:56:57,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772115672] [2021-12-18 00:56:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772115672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:57,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:56:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:56:57,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334518284] [2021-12-18 00:56:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:57,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:56:57,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:56:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:56:57,523 INFO L87 Difference]: Start difference. First operand 589 states and 735 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-18 00:56:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:57,569 INFO L93 Difference]: Finished difference Result 1029 states and 1288 transitions. [2021-12-18 00:56:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:56:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 126 [2021-12-18 00:56:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:57,572 INFO L225 Difference]: With dead ends: 1029 [2021-12-18 00:56:57,572 INFO L226 Difference]: Without dead ends: 465 [2021-12-18 00:56:57,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:56:57,574 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:57,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:56:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-18 00:56:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 433. [2021-12-18 00:56:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 344 states have (on average 1.0959302325581395) internal successors, (377), 349 states have internal predecessors, (377), 51 states have call successors, (51), 30 states have call predecessors, (51), 37 states have return successors, (66), 53 states have call predecessors, (66), 50 states have call successors, (66) [2021-12-18 00:56:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 494 transitions. [2021-12-18 00:56:57,608 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 494 transitions. Word has length 126 [2021-12-18 00:56:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:57,608 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 494 transitions. [2021-12-18 00:56:57,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-18 00:56:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 494 transitions. [2021-12-18 00:56:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-18 00:56:57,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:57,611 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:56:57,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-18 00:56:57,611 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -993241429, now seen corresponding path program 1 times [2021-12-18 00:56:57,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:57,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98764898] [2021-12-18 00:56:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:57,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:56:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:56:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:56:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:56:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:56:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:56:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-18 00:56:57,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98764898] [2021-12-18 00:56:57,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98764898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:57,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:56:57,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 00:56:57,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353551099] [2021-12-18 00:56:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:57,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 00:56:57,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 00:56:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:56:57,848 INFO L87 Difference]: Start difference. First operand 433 states and 494 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-18 00:56:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:57,981 INFO L93 Difference]: Finished difference Result 439 states and 499 transitions. [2021-12-18 00:56:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:56:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 129 [2021-12-18 00:56:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:57,982 INFO L225 Difference]: With dead ends: 439 [2021-12-18 00:56:57,983 INFO L226 Difference]: Without dead ends: 437 [2021-12-18 00:56:57,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:56:57,984 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 20 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:57,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 356 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:56:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-18 00:56:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2021-12-18 00:56:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 347 states have (on average 1.095100864553314) internal successors, (380), 352 states have internal predecessors, (380), 51 states have call successors, (51), 31 states have call predecessors, (51), 38 states have return successors, (66), 53 states have call predecessors, (66), 50 states have call successors, (66) [2021-12-18 00:56:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 497 transitions. [2021-12-18 00:56:58,012 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 497 transitions. Word has length 129 [2021-12-18 00:56:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 497 transitions. [2021-12-18 00:56:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-18 00:56:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 497 transitions. [2021-12-18 00:56:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 00:56:58,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:58,013 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:56:58,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 00:56:58,014 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1726499319, now seen corresponding path program 1 times [2021-12-18 00:56:58,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:58,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136671167] [2021-12-18 00:56:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:58,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:56:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:56:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:56:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:56:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:56:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:56:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:56:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 41 proven. 76 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 00:56:58,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136671167] [2021-12-18 00:56:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136671167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919128866] [2021-12-18 00:56:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:58,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:58,541 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:58,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:56:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 147 conjunts are in the unsatisfiable core [2021-12-18 00:56:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:58,859 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:56:58,869 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:58,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:57:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 106 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 00:57:01,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:57:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 34 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-18 00:57:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919128866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:57:06,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:57:06,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 19] total 60 [2021-12-18 00:57:06,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956236848] [2021-12-18 00:57:06,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:57:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 00:57:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:57:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 00:57:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 00:57:06,606 INFO L87 Difference]: Start difference. First operand 437 states and 497 transitions. Second operand has 60 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 52 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-12-18 00:57:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:57:10,723 INFO L93 Difference]: Finished difference Result 564 states and 641 transitions. [2021-12-18 00:57:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 00:57:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 52 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) Word has length 137 [2021-12-18 00:57:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:57:10,725 INFO L225 Difference]: With dead ends: 564 [2021-12-18 00:57:10,725 INFO L226 Difference]: Without dead ends: 489 [2021-12-18 00:57:10,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 252 SyntacticMatches, 15 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=748, Invalid=9758, Unknown=0, NotChecked=0, Total=10506 [2021-12-18 00:57:10,726 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 195 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:57:10,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 2513 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2341 Invalid, 0 Unknown, 600 Unchecked, 1.4s Time] [2021-12-18 00:57:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-18 00:57:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 438. [2021-12-18 00:57:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 348 states have (on average 1.089080459770115) internal successors, (379), 353 states have internal predecessors, (379), 51 states have call successors, (51), 32 states have call predecessors, (51), 38 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2021-12-18 00:57:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 494 transitions. [2021-12-18 00:57:10,764 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 494 transitions. Word has length 137 [2021-12-18 00:57:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:57:10,764 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 494 transitions. [2021-12-18 00:57:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 52 states have internal predecessors, (184), 18 states have call successors, (30), 4 states have call predecessors, (30), 16 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-12-18 00:57:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 494 transitions. [2021-12-18 00:57:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 00:57:10,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:57:10,768 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:57:10,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 00:57:10,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:57:10,981 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:57:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:57:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1468333881, now seen corresponding path program 1 times [2021-12-18 00:57:10,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:57:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457725559] [2021-12-18 00:57:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:10,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:57:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:57:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:57:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:57:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:57:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:57:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:57:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:57:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:57:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:57:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-18 00:57:11,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:57:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457725559] [2021-12-18 00:57:11,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457725559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:57:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927349620] [2021-12-18 00:57:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:11,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:57:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:57:11,303 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:57:11,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:57:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 00:57:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:57:11,623 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:57:11,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:57:11,633 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:57:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:57:13,042 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50|) 0)))) is different from true [2021-12-18 00:57:14,316 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51|) 0)))) is different from true [2021-12-18 00:57:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 31 trivial. 49 not checked. [2021-12-18 00:57:15,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:57:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 46 proven. 61 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 00:57:16,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927349620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:57:16,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:57:16,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 16] total 44 [2021-12-18 00:57:16,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476085209] [2021-12-18 00:57:16,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:57:16,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 00:57:16,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:57:16,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 00:57:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1585, Unknown=2, NotChecked=162, Total=1892 [2021-12-18 00:57:16,329 INFO L87 Difference]: Start difference. First operand 438 states and 494 transitions. Second operand has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-18 00:57:17,935 WARN L860 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_50|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_50|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_51|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_51|) 0))))) is different from true [2021-12-18 00:57:26,354 WARN L227 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 36 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:33,626 WARN L227 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 41 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:40,923 WARN L227 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 41 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:57:41,831 INFO L93 Difference]: Finished difference Result 596 states and 688 transitions. [2021-12-18 00:57:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 00:57:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 137 [2021-12-18 00:57:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:57:41,833 INFO L225 Difference]: With dead ends: 596 [2021-12-18 00:57:41,833 INFO L226 Difference]: Without dead ends: 475 [2021-12-18 00:57:41,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 16 SemanticMatches, 66 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=401, Invalid=3767, Unknown=4, NotChecked=384, Total=4556 [2021-12-18 00:57:41,835 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 179 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:57:41,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1323 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 553 Invalid, 0 Unknown, 497 Unchecked, 0.3s Time] [2021-12-18 00:57:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-18 00:57:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2021-12-18 00:57:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 340 states have (on average 1.0852941176470587) internal successors, (369), 344 states have internal predecessors, (369), 51 states have call successors, (51), 31 states have call predecessors, (51), 36 states have return successors, (60), 52 states have call predecessors, (60), 50 states have call successors, (60) [2021-12-18 00:57:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 480 transitions. [2021-12-18 00:57:41,874 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 480 transitions. Word has length 137 [2021-12-18 00:57:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:57:41,874 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 480 transitions. [2021-12-18 00:57:41,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.25) internal successors, (187), 42 states have internal predecessors, (187), 14 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2021-12-18 00:57:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 480 transitions. [2021-12-18 00:57:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 00:57:41,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:57:41,875 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:57:41,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 00:57:42,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:57:42,095 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:57:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:57:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1828403403, now seen corresponding path program 1 times [2021-12-18 00:57:42,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:57:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207725575] [2021-12-18 00:57:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:42,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:57:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:57:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:57:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:57:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:57:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:57:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:57:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:57:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:57:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:57:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:57:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:57:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-18 00:57:42,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:57:42,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207725575] [2021-12-18 00:57:42,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207725575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:57:42,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:57:42,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 00:57:42,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85247282] [2021-12-18 00:57:42,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:57:42,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:57:42,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:57:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:57:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 00:57:42,312 INFO L87 Difference]: Start difference. First operand 428 states and 480 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:57:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:57:42,502 INFO L93 Difference]: Finished difference Result 444 states and 495 transitions. [2021-12-18 00:57:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:57:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 146 [2021-12-18 00:57:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:57:42,504 INFO L225 Difference]: With dead ends: 444 [2021-12-18 00:57:42,504 INFO L226 Difference]: Without dead ends: 428 [2021-12-18 00:57:42,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:57:42,505 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 43 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:57:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 322 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:57:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-18 00:57:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2021-12-18 00:57:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 338 states have (on average 1.0769230769230769) internal successors, (364), 342 states have internal predecessors, (364), 51 states have call successors, (51), 31 states have call predecessors, (51), 36 states have return successors, (60), 52 states have call predecessors, (60), 50 states have call successors, (60) [2021-12-18 00:57:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 475 transitions. [2021-12-18 00:57:42,559 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 475 transitions. Word has length 146 [2021-12-18 00:57:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:57:42,575 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 475 transitions. [2021-12-18 00:57:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-18 00:57:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 475 transitions. [2021-12-18 00:57:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 00:57:42,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:57:42,577 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:57:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-18 00:57:42,578 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:57:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:57:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1435376393, now seen corresponding path program 1 times [2021-12-18 00:57:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:57:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784529568] [2021-12-18 00:57:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:42,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:57:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:57:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:57:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:57:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:57:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:57:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:57:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:57:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:57:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:57:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:57:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:57:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 53 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-18 00:57:43,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:57:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784529568] [2021-12-18 00:57:43,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784529568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:57:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196574028] [2021-12-18 00:57:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:43,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:57:43,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:57:43,015 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:57:43,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 00:57:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 00:57:43,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:57:43,320 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:57:43,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:57:43,333 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:57:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:57:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-18 00:57:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:57:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 00:57:45,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196574028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:57:45,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:57:45,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 11] total 35 [2021-12-18 00:57:45,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419941615] [2021-12-18 00:57:45,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:57:45,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 00:57:45,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:57:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 00:57:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 00:57:45,271 INFO L87 Difference]: Start difference. First operand 426 states and 475 transitions. Second operand has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 states have internal predecessors, (168), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-18 00:57:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:57:45,959 INFO L93 Difference]: Finished difference Result 493 states and 541 transitions. [2021-12-18 00:57:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 00:57:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 states have internal predecessors, (168), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) Word has length 146 [2021-12-18 00:57:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:57:45,961 INFO L225 Difference]: With dead ends: 493 [2021-12-18 00:57:45,961 INFO L226 Difference]: Without dead ends: 462 [2021-12-18 00:57:45,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 286 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 00:57:45,962 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 161 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:57:45,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1111 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 277 Invalid, 0 Unknown, 217 Unchecked, 0.2s Time] [2021-12-18 00:57:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-18 00:57:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 449. [2021-12-18 00:57:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 357 states have (on average 1.0672268907563025) internal successors, (381), 360 states have internal predecessors, (381), 53 states have call successors, (53), 34 states have call predecessors, (53), 38 states have return successors, (60), 54 states have call predecessors, (60), 52 states have call successors, (60) [2021-12-18 00:57:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 494 transitions. [2021-12-18 00:57:45,998 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 494 transitions. Word has length 146 [2021-12-18 00:57:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:57:45,999 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 494 transitions. [2021-12-18 00:57:45,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 states have internal predecessors, (168), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (38), 9 states have call predecessors, (38), 10 states have call successors, (38) [2021-12-18 00:57:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 494 transitions. [2021-12-18 00:57:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 00:57:46,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:57:46,000 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:57:46,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 00:57:46,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-18 00:57:46,215 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:57:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:57:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 298506686, now seen corresponding path program 3 times [2021-12-18 00:57:46,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:57:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223454900] [2021-12-18 00:57:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:57:46,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:57:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:57:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:57:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:57:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:57:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 00:57:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:57:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:57:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:57:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:57:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:57:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:57:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:57:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-18 00:57:46,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:57:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223454900] [2021-12-18 00:57:46,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223454900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:57:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679562026] [2021-12-18 00:57:46,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 00:57:46,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:57:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:57:46,494 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:57:46,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 00:57:46,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 00:57:46,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:57:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-18 00:57:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:57:46,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-18 00:57:46,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:57:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2021-12-18 00:57:46,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-18 00:57:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 168 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 00:57:49,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:04,207 WARN L227 SmtUtils]: Spent 13.56s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:58:18,321 WARN L227 SmtUtils]: Spent 14.03s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:58:32,577 WARN L227 SmtUtils]: Spent 14.19s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:58:39,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679562026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:39,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:58:39,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 30] total 40 [2021-12-18 00:58:39,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522953416] [2021-12-18 00:58:39,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:39,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 00:58:39,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 00:58:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2640, Unknown=1, NotChecked=0, Total=2862 [2021-12-18 00:58:39,540 INFO L87 Difference]: Start difference. First operand 449 states and 494 transitions. Second operand has 40 states, 38 states have (on average 4.0) internal successors, (152), 38 states have internal predecessors, (152), 14 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-18 00:58:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:45,444 INFO L93 Difference]: Finished difference Result 871 states and 970 transitions. [2021-12-18 00:58:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 00:58:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 4.0) internal successors, (152), 38 states have internal predecessors, (152), 14 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) Word has length 146 [2021-12-18 00:58:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:45,447 INFO L225 Difference]: With dead ends: 871 [2021-12-18 00:58:45,447 INFO L226 Difference]: Without dead ends: 662 [2021-12-18 00:58:45,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 175 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=447, Invalid=5102, Unknown=1, NotChecked=0, Total=5550 [2021-12-18 00:58:45,448 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 47 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:45,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2242 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 416 Unchecked, 0.2s Time] [2021-12-18 00:58:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-18 00:58:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 560. [2021-12-18 00:58:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 449 states have (on average 1.069042316258352) internal successors, (480), 455 states have internal predecessors, (480), 62 states have call successors, (62), 42 states have call predecessors, (62), 48 states have return successors, (71), 62 states have call predecessors, (71), 61 states have call successors, (71) [2021-12-18 00:58:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 613 transitions. [2021-12-18 00:58:45,498 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 613 transitions. Word has length 146 [2021-12-18 00:58:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:45,498 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 613 transitions. [2021-12-18 00:58:45,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 4.0) internal successors, (152), 38 states have internal predecessors, (152), 14 states have call successors, (20), 5 states have call predecessors, (20), 9 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-18 00:58:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 613 transitions. [2021-12-18 00:58:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-18 00:58:45,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:45,499 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:58:45,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:45,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-18 00:58:45,716 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2062249852, now seen corresponding path program 2 times [2021-12-18 00:58:45,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234353743] [2021-12-18 00:58:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:45,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:45,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:45,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:58:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:45,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:45,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:58:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:58:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:58:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-18 00:58:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 62 proven. 88 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-18 00:58:46,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234353743] [2021-12-18 00:58:46,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234353743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829132159] [2021-12-18 00:58:46,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:58:46,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:46,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:46,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:46,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 00:58:46,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:58:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:58:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 187 conjunts are in the unsatisfiable core [2021-12-18 00:58:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:58:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:58:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:58:46,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:58:46,822 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-12-18 00:58:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 90 [2021-12-18 00:58:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2021-12-18 00:58:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2021-12-18 00:58:46,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-18 00:58:46,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-18 00:58:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-12-18 00:58:46,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:58:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 119 proven. 80 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 00:58:50,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:53,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2919 (Array Int Int)) (v_ArrVal_2918 (Array Int Int)) (v_ArrVal_2917 (Array Int Int)) (v_ArrVal_2914 (Array Int Int))) (let ((.cse7 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2919) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2918) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) (.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2917) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_2914) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)))) (let ((.cse4 (select (select .cse2 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)) (.cse6 (select (select .cse5 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))) (let ((.cse0 (select (select .cse2 .cse4) .cse6)) (.cse1 (select (select .cse5 .cse4) .cse6))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| .cse0)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16) .cse1)) (let ((.cse3 (+ .cse1 8))) (and (= (select (select .cse2 .cse0) .cse3) .cse4) (= (select (select .cse5 .cse0) .cse3) .cse6))))))))) is different from false [2021-12-18 00:58:53,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 814 treesize of output 646 [2021-12-18 00:58:53,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:53,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 858 treesize of output 690 [2021-12-18 00:58:54,522 INFO L354 Elim1Store]: treesize reduction 58, result has 92.3 percent of original size [2021-12-18 00:58:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 105381 treesize of output 83955 Killed by 15