./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_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_begin_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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:19:55,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:19:55,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:19:55,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:19:55,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:19:55,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:19:55,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:19:55,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:19:55,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:19:55,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:19:55,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:19:55,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:19:55,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:19:55,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:19:55,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:19:55,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:19:55,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:19:55,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:19:55,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:19:55,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:19:55,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:19:55,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:19:55,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:19:55,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:19:55,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:19:55,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:19:55,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:19:55,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:19:55,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:19:55,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:19:55,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:19:55,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:19:55,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:19:55,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:19:55,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:19:55,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:19:55,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:19:55,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:19:55,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:19:55,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:19:55,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:19:55,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:19:55,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:19:55,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:19:55,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:19:55,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:19:55,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:19:55,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:19:55,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:19:55,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:19:55,461 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:19:55,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:19:55,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:19:55,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:19:55,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:19:55,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:19:55,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:19:55,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:19:55,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:19:55,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:19:55,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:19:55,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:19:55,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:19:55,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:19:55,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:19:55,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:19:55,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:19:55,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:19:55,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:19:55,466 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:19:55,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:19:55,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:19:55,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:19:55,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-12-16 03:19:55,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:19:55,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:19:55,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:19:55,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:19:55,724 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:19:55,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-12-16 03:19:55,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f010ad4b6/977b2ce1049643528d6146744e0f8987/FLAG7f7c36859 [2021-12-16 03:19:56,477 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:19:56,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-12-16 03:19:56,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f010ad4b6/977b2ce1049643528d6146744e0f8987/FLAG7f7c36859 [2021-12-16 03:19:56,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f010ad4b6/977b2ce1049643528d6146744e0f8987 [2021-12-16 03:19:56,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:19:56,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:19:56,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:19:56,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:19:56,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:19:56,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:19:56" (1/1) ... [2021-12-16 03:19:56,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c965a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:56, skipping insertion in model container [2021-12-16 03:19:56,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:19:56" (1/1) ... [2021-12-16 03:19:56,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:19:56,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:19:57,151 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_begin_harness.i[4495,4508] [2021-12-16 03:19:57,157 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_begin_harness.i[4555,4568] [2021-12-16 03:19:57,704 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,706 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,707 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,728 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,731 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:57,952 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:19:57,953 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:19:57,953 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:19:57,954 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:19:57,955 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:19:57,956 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:19:57,956 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:19:57,957 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:19:57,957 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:19:57,958 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:19:58,048 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:19:58,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:19:58,082 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:19:58,094 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_begin_harness.i[4495,4508] [2021-12-16 03:19:58,095 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_begin_harness.i[4555,4568] [2021-12-16 03:19:58,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,192 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,192 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,193 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,210 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,211 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,212 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,212 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,213 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,214 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,215 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:19:58,269 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:19:58,272 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:19:58,274 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:19:58,274 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:19:58,275 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:19:58,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:19:58,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:19:58,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:19:58,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:19:58,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:19:58,310 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:19:58,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:19:58,524 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:19:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58 WrapperNode [2021-12-16 03:19:58,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:19:58,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:19:58,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:19:58,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:19:58,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,649 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2021-12-16 03:19:58,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:19:58,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:19:58,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:19:58,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:19:58,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:19:58,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:19:58,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:19:58,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:19:58,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (1/1) ... [2021-12-16 03:19:58,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:19:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:19:58,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 03:19:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 03:19:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:19:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:19:58,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:19:58,798 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-16 03:19:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-16 03:19:58,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:19:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-16 03:19:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-16 03:19:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:19:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:19:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:19:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:19:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:19:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:19:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:19:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:19:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:19:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-16 03:19:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-16 03:19:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:19:58,993 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:19:58,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:19:59,249 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:19:59,256 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:19:59,258 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:19:59,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:19:59 BoogieIcfgContainer [2021-12-16 03:19:59,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:19:59,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:19:59,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:19:59,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:19:59,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:19:56" (1/3) ... [2021-12-16 03:19:59,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcdeed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:19:59, skipping insertion in model container [2021-12-16 03:19:59,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:19:58" (2/3) ... [2021-12-16 03:19:59,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcdeed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:19:59, skipping insertion in model container [2021-12-16 03:19:59,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:19:59" (3/3) ... [2021-12-16 03:19:59,268 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2021-12-16 03:19:59,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:19:59,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:19:59,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:19:59,329 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:19:59,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:19:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 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) [2021-12-16 03:19:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 03:19:59,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:19:59,357 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] [2021-12-16 03:19:59,357 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:19:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:19:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2021-12-16 03:19:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:19:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169709724] [2021-12-16 03:19:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:19:59,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:19:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:19:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:19:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:19:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:19:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:19:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:19:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:19:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:19:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 03:19:59,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:19:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169709724] [2021-12-16 03:19:59,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169709724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:19:59,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:19:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:19:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663021313] [2021-12-16 03:19:59,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:19:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:19:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:19:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:19:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:19:59,919 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 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) [2021-12-16 03:19:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:19:59,945 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-12-16 03:19:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:19:59,948 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 [2021-12-16 03:19:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:19:59,956 INFO L225 Difference]: With dead ends: 130 [2021-12-16 03:19:59,956 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 03:19:59,960 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 [2021-12-16 03:19:59,965 INFO L933 BasicCegarLoop]: 88 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, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:19:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:19:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 03:20:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-16 03:20:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 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) [2021-12-16 03:20:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-12-16 03:20:00,014 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2021-12-16 03:20:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:00,015 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-12-16 03:20:00,016 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) [2021-12-16 03:20:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-12-16 03:20:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 03:20:00,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:00,021 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] [2021-12-16 03:20:00,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:20:00,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2021-12-16 03:20:00,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:00,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476172183] [2021-12-16 03:20:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:00,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:20:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:20:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:20:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:20:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:20:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476172183] [2021-12-16 03:20:00,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476172183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538041257] [2021-12-16 03:20:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:00,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:00,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:00,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:20:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:00,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-16 03:20:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,623 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 [2021-12-16 03:20:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-16 03:20:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,737 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 [2021-12-16 03:20:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:00,745 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 [2021-12-16 03:20:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:01,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538041257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:01,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:01,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-12-16 03:20:01,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473282709] [2021-12-16 03:20:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:20:01,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:20:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:20:01,251 INFO L87 Difference]: Start difference. First operand 64 states and 83 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) [2021-12-16 03:20:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:01,402 INFO L93 Difference]: Finished difference Result 147 states and 198 transitions. [2021-12-16 03:20:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:20:01,402 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 [2021-12-16 03:20:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:01,407 INFO L225 Difference]: With dead ends: 147 [2021-12-16 03:20:01,407 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 03:20:01,410 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 [2021-12-16 03:20:01,412 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:01,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 470 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-12-16 03:20:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 03:20:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-12-16 03:20:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 61 states have internal predecessors, (78), 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) [2021-12-16 03:20:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-12-16 03:20:01,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 68 [2021-12-16 03:20:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:01,439 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-12-16 03:20:01,439 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) [2021-12-16 03:20:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-12-16 03:20:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 03:20:01,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:01,446 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] [2021-12-16 03:20:01,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:01,663 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 [2021-12-16 03:20:01,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -103300630, now seen corresponding path program 1 times [2021-12-16 03:20:01,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907495483] [2021-12-16 03:20:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:01,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:20:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:20:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:20:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:20:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:20:01,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907495483] [2021-12-16 03:20:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907495483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105444301] [2021-12-16 03:20:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:01,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:01,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:01,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:20:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 03:20:02,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:02,181 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-16 03:20:02,182 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 [2021-12-16 03:20:02,188 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 [2021-12-16 03:20:02,203 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 [2021-12-16 03:20:02,241 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 15 treesize of output 9 [2021-12-16 03:20:02,271 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 32 treesize of output 26 [2021-12-16 03:20:02,274 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 21 treesize of output 13 [2021-12-16 03:20:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:02,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105444301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:02,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-12-16 03:20:02,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198561401] [2021-12-16 03:20:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:02,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:20:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:20:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:20:02,682 INFO L87 Difference]: Start difference. First operand 80 states and 106 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) [2021-12-16 03:20:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:02,896 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2021-12-16 03:20:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:20:02,897 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 [2021-12-16 03:20:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:02,899 INFO L225 Difference]: With dead ends: 196 [2021-12-16 03:20:02,899 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 03:20:02,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:20:02,900 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 123 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 691 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 71 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-12-16 03:20:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 03:20:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2021-12-16 03:20:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.315217391304348) internal successors, (121), 94 states have internal predecessors, (121), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (26), 21 states have call predecessors, (26), 21 states have call successors, (26) [2021-12-16 03:20:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2021-12-16 03:20:02,913 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 68 [2021-12-16 03:20:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:02,914 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2021-12-16 03:20:02,914 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) [2021-12-16 03:20:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2021-12-16 03:20:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 03:20:02,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:02,916 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] [2021-12-16 03:20:02,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 03:20:03,143 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 [2021-12-16 03:20:03,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:03,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1824972072, now seen corresponding path program 1 times [2021-12-16 03:20:03,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:03,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814144283] [2021-12-16 03:20:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:03,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 03:20:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 03:20:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:20:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:20:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:20:03,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814144283] [2021-12-16 03:20:03,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814144283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133774862] [2021-12-16 03:20:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:03,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:03,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:20:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:20:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 03:20:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:03,493 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:03,493 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 [2021-12-16 03:20:03,514 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:03,514 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 [2021-12-16 03:20:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:20:04,333 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-16 03:20:04,333 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 [2021-12-16 03:20:04,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:20:04,341 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-16 03:20:04,341 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 [2021-12-16 03:20:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133774862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:20:04,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:20:04,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2021-12-16 03:20:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288175452] [2021-12-16 03:20:04,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:20:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 03:20:04,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 03:20:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-16 03:20:04,995 INFO L87 Difference]: Start difference. First operand 125 states and 170 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) [2021-12-16 03:20:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:06,676 INFO L93 Difference]: Finished difference Result 356 states and 580 transitions. [2021-12-16 03:20:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 03:20:06,688 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 [2021-12-16 03:20:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:06,695 INFO L225 Difference]: With dead ends: 356 [2021-12-16 03:20:06,696 INFO L226 Difference]: Without dead ends: 261 [2021-12-16 03:20:06,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 03:20:06,698 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 185 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:06,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1624 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1134 Invalid, 0 Unknown, 299 Unchecked, 0.8s Time] [2021-12-16 03:20:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-16 03:20:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-12-16 03:20:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 160 states have (on average 1.3125) internal successors, (210), 166 states have internal predecessors, (210), 45 states have call successors, (45), 13 states have call predecessors, (45), 17 states have return successors, (110), 43 states have call predecessors, (110), 43 states have call successors, (110) [2021-12-16 03:20:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 365 transitions. [2021-12-16 03:20:06,757 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 365 transitions. Word has length 68 [2021-12-16 03:20:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:06,758 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 365 transitions. [2021-12-16 03:20:06,758 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) [2021-12-16 03:20:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 365 transitions. [2021-12-16 03:20:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 03:20:06,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:06,761 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] [2021-12-16 03:20:06,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:06,982 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 [2021-12-16 03:20:06,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2021-12-16 03:20:06,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:06,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908000984] [2021-12-16 03:20:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:06,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:20:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:20:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:20:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:20:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 03:20:07,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:07,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908000984] [2021-12-16 03:20:07,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908000984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:07,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752896267] [2021-12-16 03:20:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:07,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:07,119 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) [2021-12-16 03:20:07,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:20:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 03:20:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:07,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:07,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752896267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:07,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:07,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-16 03:20:07,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824681002] [2021-12-16 03:20:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:07,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:20:07,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:20:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:20:07,394 INFO L87 Difference]: Start difference. First operand 223 states and 365 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) [2021-12-16 03:20:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:07,531 INFO L93 Difference]: Finished difference Result 406 states and 705 transitions. [2021-12-16 03:20:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:20:07,531 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 [2021-12-16 03:20:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:07,536 INFO L225 Difference]: With dead ends: 406 [2021-12-16 03:20:07,536 INFO L226 Difference]: Without dead ends: 232 [2021-12-16 03:20:07,537 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 [2021-12-16 03:20:07,537 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:07,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 245 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-16 03:20:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-16 03:20:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 166 states have (on average 1.2891566265060241) internal successors, (214), 175 states have internal predecessors, (214), 45 states have call successors, (45), 13 states have call predecessors, (45), 20 states have return successors, (134), 43 states have call predecessors, (134), 43 states have call successors, (134) [2021-12-16 03:20:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 393 transitions. [2021-12-16 03:20:07,565 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 393 transitions. Word has length 70 [2021-12-16 03:20:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:07,565 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 393 transitions. [2021-12-16 03:20:07,565 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) [2021-12-16 03:20:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 393 transitions. [2021-12-16 03:20:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 03:20:07,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:07,568 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] [2021-12-16 03:20:07,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:07,797 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 [2021-12-16 03:20:07,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2021-12-16 03:20:07,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:07,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614532773] [2021-12-16 03:20:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:07,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:20:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-16 03:20:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 03:20:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 03:20:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 03:20:07,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614532773] [2021-12-16 03:20:07,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614532773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590454779] [2021-12-16 03:20:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:07,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:07,940 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) [2021-12-16 03:20:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:20:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:20:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:08,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:08,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590454779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:08,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:08,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 03:20:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748181184] [2021-12-16 03:20:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:08,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:20:08,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:20:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:20:08,257 INFO L87 Difference]: Start difference. First operand 232 states and 393 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) [2021-12-16 03:20:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:08,511 INFO L93 Difference]: Finished difference Result 453 states and 841 transitions. [2021-12-16 03:20:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:20:08,511 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 [2021-12-16 03:20:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:08,515 INFO L225 Difference]: With dead ends: 453 [2021-12-16 03:20:08,515 INFO L226 Difference]: Without dead ends: 268 [2021-12-16 03:20:08,517 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 [2021-12-16 03:20:08,518 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:08,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:20:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-16 03:20:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-12-16 03:20:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.2848837209302326) internal successors, (221), 181 states have internal predecessors, (221), 45 states have call successors, (45), 13 states have call predecessors, (45), 20 states have return successors, (134), 43 states have call predecessors, (134), 43 states have call successors, (134) [2021-12-16 03:20:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 400 transitions. [2021-12-16 03:20:08,562 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 400 transitions. Word has length 72 [2021-12-16 03:20:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:08,562 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 400 transitions. [2021-12-16 03:20:08,562 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) [2021-12-16 03:20:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 400 transitions. [2021-12-16 03:20:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 03:20:08,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:08,564 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] [2021-12-16 03:20:08,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:08,787 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 [2021-12-16 03:20:08,787 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:08,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2021-12-16 03:20:08,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:08,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441813754] [2021-12-16 03:20:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:08,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:20:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:20:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:20:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:20:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-16 03:20:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441813754] [2021-12-16 03:20:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441813754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582978902] [2021-12-16 03:20:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:08,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:08,926 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) [2021-12-16 03:20:08,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:20:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 03:20:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 03:20:09,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:09,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582978902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:09,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:09,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 03:20:09,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757006701] [2021-12-16 03:20:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:09,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:20:09,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:20:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:20:09,156 INFO L87 Difference]: Start difference. First operand 238 states and 400 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) [2021-12-16 03:20:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:09,189 INFO L93 Difference]: Finished difference Result 448 states and 861 transitions. [2021-12-16 03:20:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:20:09,190 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 [2021-12-16 03:20:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:09,192 INFO L225 Difference]: With dead ends: 448 [2021-12-16 03:20:09,193 INFO L226 Difference]: Without dead ends: 257 [2021-12-16 03:20:09,195 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 [2021-12-16 03:20:09,195 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 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 [2021-12-16 03:20:09,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-16 03:20:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2021-12-16 03:20:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 166 states have (on average 1.283132530120482) internal successors, (213), 173 states have internal predecessors, (213), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (132), 43 states have call predecessors, (132), 43 states have call successors, (132) [2021-12-16 03:20:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 390 transitions. [2021-12-16 03:20:09,218 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 390 transitions. Word has length 73 [2021-12-16 03:20:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:09,218 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 390 transitions. [2021-12-16 03:20:09,218 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) [2021-12-16 03:20:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 390 transitions. [2021-12-16 03:20:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 03:20:09,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:09,220 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] [2021-12-16 03:20:09,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:09,427 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 [2021-12-16 03:20:09,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2021-12-16 03:20:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296910120] [2021-12-16 03:20:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 03:20:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 03:20:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 03:20:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 03:20:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:20:09,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:09,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296910120] [2021-12-16 03:20:09,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296910120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:09,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367997500] [2021-12-16 03:20:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:09,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:09,580 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) [2021-12-16 03:20:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:20:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 03:20:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:09,809 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:09,809 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 [2021-12-16 03:20:09,822 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:09,823 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 [2021-12-16 03:20:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:20:10,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-16 03:20:10,494 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 36 treesize of output 22 [2021-12-16 03:20:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:20:10,502 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-16 03:20:10,502 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 25 treesize of output 1 [2021-12-16 03:20:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:20:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:11,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367997500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:20:11,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:20:11,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2021-12-16 03:20:11,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116520251] [2021-12-16 03:20:11,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:20:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 03:20:11,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 03:20:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-12-16 03:20:11,134 INFO L87 Difference]: Start difference. First operand 230 states and 390 transitions. Second operand has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 03:20:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:11,895 INFO L93 Difference]: Finished difference Result 482 states and 896 transitions. [2021-12-16 03:20:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 03:20:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 81 [2021-12-16 03:20:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:11,898 INFO L225 Difference]: With dead ends: 482 [2021-12-16 03:20:11,899 INFO L226 Difference]: Without dead ends: 292 [2021-12-16 03:20:11,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 03:20:11,902 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 123 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:11,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 808 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 373 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2021-12-16 03:20:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-16 03:20:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 241. [2021-12-16 03:20:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 175 states have (on average 1.2685714285714285) internal successors, (222), 182 states have internal predecessors, (222), 45 states have call successors, (45), 15 states have call predecessors, (45), 20 states have return successors, (132), 43 states have call predecessors, (132), 43 states have call successors, (132) [2021-12-16 03:20:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 399 transitions. [2021-12-16 03:20:11,928 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 399 transitions. Word has length 81 [2021-12-16 03:20:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:11,929 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 399 transitions. [2021-12-16 03:20:11,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 03:20:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 399 transitions. [2021-12-16 03:20:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 03:20:11,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:11,931 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, 1, 1] [2021-12-16 03:20:11,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:12,151 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 [2021-12-16 03:20:12,152 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 976458511, now seen corresponding path program 1 times [2021-12-16 03:20:12,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:12,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332240925] [2021-12-16 03:20:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:12,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:20:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:20:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:20:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:20:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:20:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 03:20:12,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332240925] [2021-12-16 03:20:12,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332240925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991347587] [2021-12-16 03:20:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:12,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:12,380 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) [2021-12-16 03:20:12,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:20:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 03:20:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:12,614 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:12,615 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 [2021-12-16 03:20:12,626 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 03:20:12,626 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 [2021-12-16 03:20:13,730 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 [2021-12-16 03:20:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 03:20:13,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 03:20:14,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991347587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:20:14,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:20:14,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2021-12-16 03:20:14,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955573378] [2021-12-16 03:20:14,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:20:14,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:20:14,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:20:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2021-12-16 03:20:14,170 INFO L87 Difference]: Start difference. First operand 241 states and 399 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2021-12-16 03:20:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:14,790 INFO L93 Difference]: Finished difference Result 581 states and 1147 transitions. [2021-12-16 03:20:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 03:20:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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 85 [2021-12-16 03:20:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:14,795 INFO L225 Difference]: With dead ends: 581 [2021-12-16 03:20:14,796 INFO L226 Difference]: Without dead ends: 381 [2021-12-16 03:20:14,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2021-12-16 03:20:14,799 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 182 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:14,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 719 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 578 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2021-12-16 03:20:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-16 03:20:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 259. [2021-12-16 03:20:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 190 states have (on average 1.2736842105263158) internal successors, (242), 197 states have internal predecessors, (242), 47 states have call successors, (47), 16 states have call predecessors, (47), 21 states have return successors, (136), 45 states have call predecessors, (136), 45 states have call successors, (136) [2021-12-16 03:20:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 425 transitions. [2021-12-16 03:20:14,832 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 425 transitions. Word has length 85 [2021-12-16 03:20:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 425 transitions. [2021-12-16 03:20:14,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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) [2021-12-16 03:20:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 425 transitions. [2021-12-16 03:20:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 03:20:14,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:14,835 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] [2021-12-16 03:20:14,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:15,049 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 [2021-12-16 03:20:15,050 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash 559061905, now seen corresponding path program 1 times [2021-12-16 03:20:15,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:15,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946343213] [2021-12-16 03:20:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:15,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:20:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:20:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 03:20:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:20:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 03:20:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 03:20:15,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946343213] [2021-12-16 03:20:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946343213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075659274] [2021-12-16 03:20:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:15,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:15,178 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) [2021-12-16 03:20:15,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:20:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:20:15,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:20:15,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075659274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:15,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:15,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-16 03:20:15,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257200986] [2021-12-16 03:20:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:15,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:20:15,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:20:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:20:15,452 INFO L87 Difference]: Start difference. First operand 259 states and 425 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) [2021-12-16 03:20:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:15,492 INFO L93 Difference]: Finished difference Result 423 states and 706 transitions. [2021-12-16 03:20:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:20:15,492 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 [2021-12-16 03:20:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:15,494 INFO L225 Difference]: With dead ends: 423 [2021-12-16 03:20:15,494 INFO L226 Difference]: Without dead ends: 248 [2021-12-16 03:20:15,496 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 [2021-12-16 03:20:15,496 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 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 [2021-12-16 03:20:15,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-16 03:20:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-12-16 03:20:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 179 states have (on average 1.2513966480446927) internal successors, (224), 186 states have internal predecessors, (224), 47 states have call successors, (47), 16 states have call predecessors, (47), 21 states have return successors, (136), 45 states have call predecessors, (136), 45 states have call successors, (136) [2021-12-16 03:20:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 407 transitions. [2021-12-16 03:20:15,517 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 407 transitions. Word has length 85 [2021-12-16 03:20:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:15,517 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 407 transitions. [2021-12-16 03:20:15,517 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) [2021-12-16 03:20:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 407 transitions. [2021-12-16 03:20:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 03:20:15,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:15,520 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] [2021-12-16 03:20:15,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:15,733 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 [2021-12-16 03:20:15,733 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1228253713, now seen corresponding path program 1 times [2021-12-16 03:20:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306495970] [2021-12-16 03:20:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:15,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 03:20:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 03:20:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 03:20:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 03:20:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 03:20:15,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306495970] [2021-12-16 03:20:15,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306495970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883638753] [2021-12-16 03:20:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:15,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:15,905 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) [2021-12-16 03:20:15,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:20:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:20:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 03:20:16,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:16,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883638753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:16,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:16,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-16 03:20:16,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222784811] [2021-12-16 03:20:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:16,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:20:16,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:20:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:20:16,202 INFO L87 Difference]: Start difference. First operand 248 states and 407 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-12-16 03:20:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:16,229 INFO L93 Difference]: Finished difference Result 377 states and 658 transitions. [2021-12-16 03:20:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:20:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 83 [2021-12-16 03:20:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:16,232 INFO L225 Difference]: With dead ends: 377 [2021-12-16 03:20:16,232 INFO L226 Difference]: Without dead ends: 155 [2021-12-16 03:20:16,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:20:16,235 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 237 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:20:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-16 03:20:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-16 03:20:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 116 states have internal predecessors, (131), 28 states have call successors, (28), 12 states have call predecessors, (28), 15 states have return successors, (55), 26 states have call predecessors, (55), 26 states have call successors, (55) [2021-12-16 03:20:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 214 transitions. [2021-12-16 03:20:16,246 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 214 transitions. Word has length 83 [2021-12-16 03:20:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:16,246 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 214 transitions. [2021-12-16 03:20:16,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-12-16 03:20:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 214 transitions. [2021-12-16 03:20:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 03:20:16,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:16,249 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] [2021-12-16 03:20:16,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:16,474 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 [2021-12-16 03:20:16,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash 428580672, now seen corresponding path program 1 times [2021-12-16 03:20:16,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887691750] [2021-12-16 03:20:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:16,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:20:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:20:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:20:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:20:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:20:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 03:20:16,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887691750] [2021-12-16 03:20:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887691750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947699650] [2021-12-16 03:20:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:16,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:16,615 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) [2021-12-16 03:20:16,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:20:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-16 03:20:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:16,874 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 [2021-12-16 03:20:16,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:16,877 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 [2021-12-16 03:20:16,935 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-16 03:20:16,936 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 [2021-12-16 03:20:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:16,942 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 [2021-12-16 03:20:16,949 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 [2021-12-16 03:20:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:16,955 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 [2021-12-16 03:20:16,957 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 [2021-12-16 03:20:18,990 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_28| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_28|) 0) 1) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_28|)) is different from true [2021-12-16 03:20:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:31,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:33,695 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_999 (Array Int Int)) (v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$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_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2021-12-16 03:20:33,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:20:33,713 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 [2021-12-16 03:20:33,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:20:33,727 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 144 treesize of output 148 [2021-12-16 03:20:33,732 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 144 treesize of output 140 [2021-12-16 03:20:33,738 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 140 treesize of output 138 [2021-12-16 03:20:33,818 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 [2021-12-16 03:20:33,876 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 [2021-12-16 03:20:33,911 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-16 03:20:33,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:20:33,938 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 55 treesize of output 55 [2021-12-16 03:20:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2021-12-16 03:20:34,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947699650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:20:34,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:20:34,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2021-12-16 03:20:34,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37660248] [2021-12-16 03:20:34,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:20:34,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 03:20:34,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 03:20:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=488, Unknown=3, NotChecked=90, Total=650 [2021-12-16 03:20:34,077 INFO L87 Difference]: Start difference. First operand 155 states and 214 transitions. Second operand has 26 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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) [2021-12-16 03:20:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:41,122 INFO L93 Difference]: Finished difference Result 390 states and 567 transitions. [2021-12-16 03:20:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 03:20:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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 [2021-12-16 03:20:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:41,127 INFO L225 Difference]: With dead ends: 390 [2021-12-16 03:20:41,127 INFO L226 Difference]: Without dead ends: 230 [2021-12-16 03:20:41,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=158, Invalid=1179, Unknown=3, NotChecked=142, Total=1482 [2021-12-16 03:20:41,130 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 149 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1080 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:41,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1523 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1028 Invalid, 0 Unknown, 1080 Unchecked, 0.7s Time] [2021-12-16 03:20:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-16 03:20:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 204. [2021-12-16 03:20:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 156 states have internal predecessors, (179), 35 states have call successors, (35), 14 states have call predecessors, (35), 18 states have return successors, (70), 33 states have call predecessors, (70), 33 states have call successors, (70) [2021-12-16 03:20:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2021-12-16 03:20:41,150 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 86 [2021-12-16 03:20:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2021-12-16 03:20:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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) [2021-12-16 03:20:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2021-12-16 03:20:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 03:20:41,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:41,153 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:20:41,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:41,366 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 [2021-12-16 03:20:41,367 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:41,367 INFO L85 PathProgramCache]: Analyzing trace with hash -20971104, now seen corresponding path program 1 times [2021-12-16 03:20:41,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:41,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499864714] [2021-12-16 03:20:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:41,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 03:20:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 03:20:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 03:20:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:20:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:20:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:20:41,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499864714] [2021-12-16 03:20:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499864714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506790845] [2021-12-16 03:20:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:41,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:41,506 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) [2021-12-16 03:20:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:20:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:20:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 03:20:41,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:20:41,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506790845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:20:41,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:20:41,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 03:20:41,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689630860] [2021-12-16 03:20:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:20:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:20:41,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:20:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:20:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:20:41,878 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-12-16 03:20:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:20:42,038 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2021-12-16 03:20:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:20:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 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 86 [2021-12-16 03:20:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:20:42,040 INFO L225 Difference]: With dead ends: 323 [2021-12-16 03:20:42,040 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 03:20:42,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:20:42,042 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 112 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:20:42,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 291 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:20:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 03:20:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-16 03:20:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 153 states have internal predecessors, (175), 35 states have call successors, (35), 14 states have call predecessors, (35), 17 states have return successors, (64), 33 states have call predecessors, (64), 33 states have call successors, (64) [2021-12-16 03:20:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2021-12-16 03:20:42,058 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 86 [2021-12-16 03:20:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:20:42,068 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2021-12-16 03:20:42,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-12-16 03:20:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2021-12-16 03:20:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 03:20:42,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:20:42,070 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, 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] [2021-12-16 03:20:42,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 03:20:42,296 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 [2021-12-16 03:20:42,296 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:20:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:20:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1950118364, now seen corresponding path program 1 times [2021-12-16 03:20:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:20:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787735207] [2021-12-16 03:20:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:20:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:20:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:20:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 03:20:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:20:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:20:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 03:20:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 03:20:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 03:20:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 03:20:42,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:20:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787735207] [2021-12-16 03:20:42,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787735207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:20:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123129547] [2021-12-16 03:20:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:20:42,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:20:42,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:20:42,492 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) [2021-12-16 03:20:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 03:20:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:20:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 03:20:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:20:42,818 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 [2021-12-16 03:20:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:42,824 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 [2021-12-16 03:20:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:42,895 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-16 03:20:42,895 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 [2021-12-16 03:20:42,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:42,959 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 [2021-12-16 03:20:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:20:42,963 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 [2021-12-16 03:20:44,987 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_38| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_38|) 0) 1) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_38|)) is different from true [2021-12-16 03:20:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:20:57,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:20:59,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1243 Int) (v_ArrVal_1241 (Array Int Int)) (v_ArrVal_1240 (Array Int Int))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1241) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1240) |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_1243)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2021-12-16 03:20:59,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| Int) (v_ArrVal_1239 (Array Int Int)) (v_ArrVal_1243 Int) (v_ArrVal_1241 (Array Int Int)) (v_ArrVal_1240 (Array Int Int))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12|) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1239))) (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_12| v_ArrVal_1241) |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_1240) |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_1243))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))))) is different from false [2021-12-16 03:20:59,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:20:59,790 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 [2021-12-16 03:20:59,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:20:59,808 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 3590 treesize of output 3252 [2021-12-16 03:20:59,833 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 3638 treesize of output 3566 [2021-12-16 03:20:59,854 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 4398 treesize of output 4270 [2021-12-16 03:20:59,883 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 4270 treesize of output 4254 [2021-12-16 03:21:00,214 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 [2021-12-16 03:21:00,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:21:00,226 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 57 treesize of output 59 [2021-12-16 03:21:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 4 not checked. [2021-12-16 03:21:00,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123129547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:21:00,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:21:00,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 12] total 29 [2021-12-16 03:21:00,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541632983] [2021-12-16 03:21:00,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:21:00,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:21:00,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:21:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=578, Unknown=4, NotChecked=150, Total=812 [2021-12-16 03:21:00,388 INFO L87 Difference]: Start difference. First operand 201 states and 274 transitions. Second operand has 29 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24)