./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_byte_cursor_advance_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 f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:16:04,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:16:04,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:16:04,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:16:04,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:16:04,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:16:04,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:16:04,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:16:04,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:16:04,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:16:04,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:16:04,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:16:04,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:16:04,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:16:04,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:16:04,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:16:04,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:16:04,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:16:04,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:16:04,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:16:04,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:16:04,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:16:04,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:16:04,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:16:04,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:16:04,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:16:04,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:16:04,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:16:04,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:16:04,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:16:04,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:16:04,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:16:04,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:16:04,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:16:04,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:16:04,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:16:04,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:16:04,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:16:04,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:16:04,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:16:04,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:16:04,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:16:04,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:16:04,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:16:04,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:16:04,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:16:04,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:16:04,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:16:04,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:16:04,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:16:04,644 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:16:04,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:16:04,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:16:04,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:16:04,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:16:04,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:16:04,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:16:04,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:16:04,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:16:04,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:16:04,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:16:04,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:16:04,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:16:04,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:16:04,648 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:16:04,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:16:04,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:16:04,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26a5d85d152e590b5f8a93f229efbb28bdd5e77c34d7106bb5825fc4b732cf6 [2021-12-28 03:16:04,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:16:04,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:16:04,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:16:04,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:16:04,962 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:16:04,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-12-28 03:16:05,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405cf6865/b93c7170a2164509ab21d92af3b3fc99/FLAG26ee53827 [2021-12-28 03:16:05,619 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:16:05,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_advance_harness.i [2021-12-28 03:16:05,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405cf6865/b93c7170a2164509ab21d92af3b3fc99/FLAG26ee53827 [2021-12-28 03:16:06,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405cf6865/b93c7170a2164509ab21d92af3b3fc99 [2021-12-28 03:16:06,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:16:06,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:16:06,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:16:06,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:16:06,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:16:06,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:16:06" (1/1) ... [2021-12-28 03:16:06,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ac0c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:06, skipping insertion in model container [2021-12-28 03:16:06,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:16:06" (1/1) ... [2021-12-28 03:16:06,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:16:06,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:16:06,290 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_byte_cursor_advance_harness.i[4497,4510] [2021-12-28 03:16:06,295 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_byte_cursor_advance_harness.i[4557,4570] [2021-12-28 03:16:06,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,779 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,791 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:06,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,002 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:16:07,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:16:07,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:16:07,006 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:16:07,010 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:16:07,012 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:16:07,013 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:16:07,014 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:16:07,014 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:16:07,015 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:16:07,108 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:16:07,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:16:07,251 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:16:07,268 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_byte_cursor_advance_harness.i[4497,4510] [2021-12-28 03:16:07,269 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_byte_cursor_advance_harness.i[4557,4570] [2021-12-28 03:16:07,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,329 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,330 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,331 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,366 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:16:07,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:16:07,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:16:07,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:16:07,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:16:07,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:16:07,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:16:07,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:16:07,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:16:07,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:16:07,385 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:16:07,449 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:16:07,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:16:07,710 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:16:07,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07 WrapperNode [2021-12-28 03:16:07,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:16:07,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:16:07,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:16:07,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:16:07,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,881 INFO L137 Inliner]: procedures = 690, calls = 2642, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 882 [2021-12-28 03:16:07,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:16:07,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:16:07,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:16:07,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:16:07,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:16:07,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:16:07,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:16:07,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:16:07,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (1/1) ... [2021-12-28 03:16:07,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:16:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:07,973 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) [2021-12-28 03:16:07,978 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 [2021-12-28 03:16:08,002 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-28 03:16:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-28 03:16:08,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:16:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:16:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:16:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:16:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:16:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:16:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:16:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:16:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:16:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:16:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:16:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:16:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:16:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-28 03:16:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-28 03:16:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:16:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:16:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:16:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:16:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:16:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:16:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:16:08,246 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:16:08,251 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:16:08,946 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:16:08,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:16:08,952 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:16:08,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:16:08 BoogieIcfgContainer [2021-12-28 03:16:08,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:16:08,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:16:08,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:16:08,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:16:08,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:16:06" (1/3) ... [2021-12-28 03:16:08,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d655b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:16:08, skipping insertion in model container [2021-12-28 03:16:08,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:16:07" (2/3) ... [2021-12-28 03:16:08,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d655b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:16:08, skipping insertion in model container [2021-12-28 03:16:08,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:16:08" (3/3) ... [2021-12-28 03:16:08,966 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_advance_harness.i [2021-12-28 03:16:08,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:16:08,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:16:09,019 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:16:09,027 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 [2021-12-28 03:16:09,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:16:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-28 03:16:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 03:16:09,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:09,060 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:09,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1865164224, now seen corresponding path program 1 times [2021-12-28 03:16:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813843641] [2021-12-28 03:16:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:09,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:16:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-28 03:16:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 03:16:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 03:16:09,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813843641] [2021-12-28 03:16:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813843641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:09,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:09,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:16:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014437292] [2021-12-28 03:16:09,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:09,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:16:09,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:16:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:16:09,602 INFO L87 Difference]: Start difference. First operand has 90 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:09,641 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-12-28 03:16:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:16:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-12-28 03:16:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:09,651 INFO L225 Difference]: With dead ends: 170 [2021-12-28 03:16:09,651 INFO L226 Difference]: Without dead ends: 80 [2021-12-28 03:16:09,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:16:09,661 INFO L933 BasicCegarLoop]: 118 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, 118 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 [2021-12-28 03:16:09,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:16:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-28 03:16:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-28 03:16:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 03:16:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2021-12-28 03:16:09,702 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 47 [2021-12-28 03:16:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:09,704 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2021-12-28 03:16:09,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2021-12-28 03:16:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 03:16:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:09,707 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:16:09,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 866728124, now seen corresponding path program 1 times [2021-12-28 03:16:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61337823] [2021-12-28 03:16:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:16:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 03:16:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-28 03:16:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 03:16:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 03:16:09,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61337823] [2021-12-28 03:16:09,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61337823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316331759] [2021-12-28 03:16:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:09,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:09,959 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) [2021-12-28 03:16:09,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:16:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:16:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 03:16:10,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:16:10,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316331759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:10,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:16:10,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-28 03:16:10,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817283645] [2021-12-28 03:16:10,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:10,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:16:10,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:16:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:16:10,696 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:10,902 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2021-12-28 03:16:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:16:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-12-28 03:16:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:10,904 INFO L225 Difference]: With dead ends: 146 [2021-12-28 03:16:10,904 INFO L226 Difference]: Without dead ends: 83 [2021-12-28 03:16:10,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:16:10,906 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:10,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 259 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:16:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-28 03:16:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-28 03:16:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2021-12-28 03:16:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2021-12-28 03:16:10,914 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 47 [2021-12-28 03:16:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:10,914 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2021-12-28 03:16:10,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2021-12-28 03:16:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 03:16:10,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:10,916 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:10,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:11,139 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 [2021-12-28 03:16:11,139 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -912055711, now seen corresponding path program 1 times [2021-12-28 03:16:11,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259424239] [2021-12-28 03:16:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:11,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:16:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:16:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 03:16:11,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:11,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259424239] [2021-12-28 03:16:11,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259424239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:11,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489435293] [2021-12-28 03:16:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:11,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:11,372 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) [2021-12-28 03:16:11,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:16:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:11,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:16:11,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:16:11,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:16:11,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489435293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:11,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:16:11,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-28 03:16:11,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201456262] [2021-12-28 03:16:11,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:11,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:16:11,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:16:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:16:11,871 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:16:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:12,025 INFO L93 Difference]: Finished difference Result 141 states and 189 transitions. [2021-12-28 03:16:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:16:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-12-28 03:16:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:12,028 INFO L225 Difference]: With dead ends: 141 [2021-12-28 03:16:12,029 INFO L226 Difference]: Without dead ends: 83 [2021-12-28 03:16:12,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:16:12,031 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:12,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 257 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:16:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-28 03:16:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-28 03:16:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-28 03:16:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2021-12-28 03:16:12,046 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 49 [2021-12-28 03:16:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:12,046 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2021-12-28 03:16:12,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:16:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2021-12-28 03:16:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 03:16:12,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:12,050 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:12,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:12,267 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 [2021-12-28 03:16:12,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash -633300053, now seen corresponding path program 1 times [2021-12-28 03:16:12,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:12,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726707353] [2021-12-28 03:16:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:12,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:16:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:16:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 03:16:12,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726707353] [2021-12-28 03:16:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726707353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:12,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:12,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:16:12,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831351078] [2021-12-28 03:16:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:12,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:16:12,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:16:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:16:12,461 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:16:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:12,507 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-28 03:16:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:16:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2021-12-28 03:16:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:12,509 INFO L225 Difference]: With dead ends: 95 [2021-12-28 03:16:12,509 INFO L226 Difference]: Without dead ends: 93 [2021-12-28 03:16:12,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:16:12,510 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:12,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 701 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:16:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-28 03:16:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-28 03:16:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.2) internal successors, (72), 64 states have internal predecessors, (72), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (27), 20 states have call predecessors, (27), 20 states have call successors, (27) [2021-12-28 03:16:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2021-12-28 03:16:12,516 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 53 [2021-12-28 03:16:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:12,516 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2021-12-28 03:16:12,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:16:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2021-12-28 03:16:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 03:16:12,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:12,518 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:12,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:16:12,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1847539699, now seen corresponding path program 1 times [2021-12-28 03:16:12,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:12,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208519389] [2021-12-28 03:16:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:12,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:16:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:16:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 03:16:13,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208519389] [2021-12-28 03:16:13,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208519389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977474502] [2021-12-28 03:16:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:13,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:13,025 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) [2021-12-28 03:16:13,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:16:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-28 03:16:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:13,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:13,959 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:16:13,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-28 03:16:14,052 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-28 03:16:14,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-28 03:16:14,588 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:16:14,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:16:14,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:16:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:16:14,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:15,079 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_270 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_ArrVal_270) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-12-28 03:16:15,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977474502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:15,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:15,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-12-28 03:16:15,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644979572] [2021-12-28 03:16:15,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:15,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:16:15,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:15,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:16:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1107, Unknown=1, NotChecked=68, Total=1332 [2021-12-28 03:16:15,183 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-28 03:16:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:16,300 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2021-12-28 03:16:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-28 03:16:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) Word has length 57 [2021-12-28 03:16:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:16,303 INFO L225 Difference]: With dead ends: 261 [2021-12-28 03:16:16,303 INFO L226 Difference]: Without dead ends: 196 [2021-12-28 03:16:16,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=2154, Unknown=1, NotChecked=96, Total=2550 [2021-12-28 03:16:16,304 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 127 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:16,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1146 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 823 Invalid, 0 Unknown, 457 Unchecked, 0.7s Time] [2021-12-28 03:16:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-28 03:16:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-12-28 03:16:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (42), 31 states have call predecessors, (42), 31 states have call successors, (42) [2021-12-28 03:16:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2021-12-28 03:16:16,318 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 57 [2021-12-28 03:16:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:16,318 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2021-12-28 03:16:16,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-28 03:16:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2021-12-28 03:16:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 03:16:16,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:16,320 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:16,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:16,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:16,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash 259191797, now seen corresponding path program 1 times [2021-12-28 03:16:16,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83445465] [2021-12-28 03:16:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:16,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:16:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:16:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 03:16:17,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83445465] [2021-12-28 03:16:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83445465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315715340] [2021-12-28 03:16:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:17,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:17,072 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) [2021-12-28 03:16:17,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:16:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-28 03:16:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:22,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:22,920 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-28 03:16:22,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-28 03:16:23,005 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-28 03:16:23,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-28 03:16:23,495 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-28 03:16:23,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 03:16:23,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 51 [2021-12-28 03:16:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:23,607 INFO L387 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 59 treesize of output 52 [2021-12-28 03:16:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:16:23,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2021-12-28 03:16:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:16:24,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:24,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:16:24,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-28 03:16:24,689 WARN L838 $PredicateComparison]: unable to prove that (or |c_ULTIMATE.start_aws_byte_cursor_advance_#t~short1082#1| (forall ((v_arrayElimArr_2 (Array Int Int)) (v_ArrVal_383 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| Int)) (or (<= |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1| (let ((.cse0 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_2) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| 8) v_ArrVal_383) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (+ .cse0 (* 18446744073709551616 (div (+ (* (- 1) .cse0) |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1|) 18446744073709551616))))) (not (= (select v_arrayElimArr_2 |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|) |c_ULTIMATE.start_aws_byte_cursor_advance_~len#1|))))) is different from false [2021-12-28 03:16:24,709 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array Int Int)) (v_ArrVal_383 Int) (|ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset| Int)) (let ((.cse0 (select v_arrayElimArr_2 |ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.offset|))) (or (<= .cse0 (let ((.cse1 (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_arrayElimArr_2) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| 8) v_ArrVal_383) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|))) (+ (* (div (+ .cse0 (* (- 1) .cse1)) 18446744073709551616) 18446744073709551616) .cse1))) (< (mod (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset|) 18446744073709551616) (mod .cse0 18446744073709551616))))) is different from false [2021-12-28 03:16:24,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315715340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:24,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:24,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-12-28 03:16:24,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603958442] [2021-12-28 03:16:24,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:24,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 03:16:24,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 03:16:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1122, Unknown=2, NotChecked=138, Total=1406 [2021-12-28 03:16:24,872 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-28 03:16:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:26,706 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2021-12-28 03:16:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-28 03:16:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) Word has length 57 [2021-12-28 03:16:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:26,708 INFO L225 Difference]: With dead ends: 256 [2021-12-28 03:16:26,708 INFO L226 Difference]: Without dead ends: 187 [2021-12-28 03:16:26,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=283, Invalid=2375, Unknown=2, NotChecked=202, Total=2862 [2021-12-28 03:16:26,709 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 80 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:26,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1040 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 451 Invalid, 0 Unknown, 286 Unchecked, 0.6s Time] [2021-12-28 03:16:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-28 03:16:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2021-12-28 03:16:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 119 states have internal predecessors, (143), 37 states have call successors, (37), 14 states have call predecessors, (37), 13 states have return successors, (46), 33 states have call predecessors, (46), 34 states have call successors, (46) [2021-12-28 03:16:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 226 transitions. [2021-12-28 03:16:26,722 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 226 transitions. Word has length 57 [2021-12-28 03:16:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:26,722 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 226 transitions. [2021-12-28 03:16:26,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-28 03:16:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 226 transitions. [2021-12-28 03:16:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-28 03:16:26,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:26,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:26,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:26,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:26,939 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1565075525, now seen corresponding path program 2 times [2021-12-28 03:16:26,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:26,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798548361] [2021-12-28 03:16:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:26,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 03:16:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:16:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 03:16:27,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798548361] [2021-12-28 03:16:27,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798548361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921032706] [2021-12-28 03:16:27,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:16:27,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:27,158 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) [2021-12-28 03:16:27,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:16:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:16:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:16:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 03:16:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 03:16:27,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:16:27,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921032706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:27,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:16:27,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-12-28 03:16:27,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281623719] [2021-12-28 03:16:27,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:27,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:16:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:16:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:16:27,896 INFO L87 Difference]: Start difference. First operand 167 states and 226 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:16:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:27,992 INFO L93 Difference]: Finished difference Result 235 states and 323 transitions. [2021-12-28 03:16:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:16:27,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2021-12-28 03:16:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:27,997 INFO L225 Difference]: With dead ends: 235 [2021-12-28 03:16:27,997 INFO L226 Difference]: Without dead ends: 167 [2021-12-28 03:16:27,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:16:27,998 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:27,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 790 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:16:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-28 03:16:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-12-28 03:16:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 119 states have internal predecessors, (142), 37 states have call successors, (37), 14 states have call predecessors, (37), 13 states have return successors, (50), 33 states have call predecessors, (50), 34 states have call successors, (50) [2021-12-28 03:16:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 229 transitions. [2021-12-28 03:16:28,020 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 229 transitions. Word has length 61 [2021-12-28 03:16:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:28,021 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 229 transitions. [2021-12-28 03:16:28,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-28 03:16:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 229 transitions. [2021-12-28 03:16:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 03:16:28,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:28,023 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:28,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:28,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:28,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1300919918, now seen corresponding path program 1 times [2021-12-28 03:16:28,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892820707] [2021-12-28 03:16:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:28,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:16:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:16:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 03:16:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 03:16:28,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892820707] [2021-12-28 03:16:28,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892820707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:28,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:28,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:16:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884624856] [2021-12-28 03:16:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:16:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:16:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:16:28,509 INFO L87 Difference]: Start difference. First operand 167 states and 229 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:16:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:28,739 INFO L93 Difference]: Finished difference Result 284 states and 404 transitions. [2021-12-28 03:16:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:16:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-12-28 03:16:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:28,743 INFO L225 Difference]: With dead ends: 284 [2021-12-28 03:16:28,743 INFO L226 Difference]: Without dead ends: 195 [2021-12-28 03:16:28,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:16:28,744 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 38 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:28,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 474 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:16:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-28 03:16:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-12-28 03:16:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (49), 32 states have call predecessors, (49), 33 states have call successors, (49) [2021-12-28 03:16:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 223 transitions. [2021-12-28 03:16:28,766 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 223 transitions. Word has length 64 [2021-12-28 03:16:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:28,766 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 223 transitions. [2021-12-28 03:16:28,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 03:16:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 223 transitions. [2021-12-28 03:16:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-28 03:16:28,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:28,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:28,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:16:28,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash -145583488, now seen corresponding path program 1 times [2021-12-28 03:16:28,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839666578] [2021-12-28 03:16:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:28,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:16:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:16:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 03:16:28,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839666578] [2021-12-28 03:16:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839666578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463201044] [2021-12-28 03:16:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:28,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:29,002 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) [2021-12-28 03:16:29,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:16:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:16:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:16:29,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:16:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463201044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:29,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:16:29,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-28 03:16:29,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869490773] [2021-12-28 03:16:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:29,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:16:29,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:16:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:16:29,573 INFO L87 Difference]: Start difference. First operand 164 states and 223 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:29,730 INFO L93 Difference]: Finished difference Result 262 states and 370 transitions. [2021-12-28 03:16:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:16:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-12-28 03:16:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:29,732 INFO L225 Difference]: With dead ends: 262 [2021-12-28 03:16:29,732 INFO L226 Difference]: Without dead ends: 164 [2021-12-28 03:16:29,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:16:29,733 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 15 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:29,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 330 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-12-28 03:16:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-28 03:16:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-12-28 03:16:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 117 states have internal predecessors, (137), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (49), 32 states have call predecessors, (49), 33 states have call successors, (49) [2021-12-28 03:16:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 222 transitions. [2021-12-28 03:16:29,742 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 222 transitions. Word has length 63 [2021-12-28 03:16:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:29,743 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 222 transitions. [2021-12-28 03:16:29,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:16:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 222 transitions. [2021-12-28 03:16:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-28 03:16:29,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:29,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:16:29,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-28 03:16:29,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:29,959 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 556016386, now seen corresponding path program 1 times [2021-12-28 03:16:29,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377289330] [2021-12-28 03:16:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:29,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:16:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:16:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:16:30,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:30,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377289330] [2021-12-28 03:16:30,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377289330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:30,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830913443] [2021-12-28 03:16:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:30,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:30,496 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) [2021-12-28 03:16:30,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:16:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-28 03:16:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:30,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:16:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:16:31,597 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:16:31,597 INFO L387 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 29 treesize of output 1 [2021-12-28 03:16:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:16:31,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 03:16:31,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830913443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:16:31,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:16:31,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 30 [2021-12-28 03:16:31,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710751349] [2021-12-28 03:16:32,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:32,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 03:16:32,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 03:16:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-12-28 03:16:32,001 INFO L87 Difference]: Start difference. First operand 164 states and 222 transitions. Second operand has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 30 states have internal predecessors, (103), 9 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-28 03:16:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:33,267 INFO L93 Difference]: Finished difference Result 297 states and 401 transitions. [2021-12-28 03:16:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 03:16:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 30 states have internal predecessors, (103), 9 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) Word has length 63 [2021-12-28 03:16:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:33,269 INFO L225 Difference]: With dead ends: 297 [2021-12-28 03:16:33,269 INFO L226 Difference]: Without dead ends: 201 [2021-12-28 03:16:33,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 03:16:33,270 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 112 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:33,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 903 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 791 Invalid, 0 Unknown, 316 Unchecked, 0.7s Time] [2021-12-28 03:16:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-28 03:16:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 163. [2021-12-28 03:16:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 116 states have internal predecessors, (132), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-12-28 03:16:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2021-12-28 03:16:33,291 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 214 transitions. Word has length 63 [2021-12-28 03:16:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:33,291 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 214 transitions. [2021-12-28 03:16:33,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 30 states have internal predecessors, (103), 9 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-28 03:16:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 214 transitions. [2021-12-28 03:16:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:16:33,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:33,296 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:16:33,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:16:33,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:33,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1118956732, now seen corresponding path program 1 times [2021-12-28 03:16:33,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121436893] [2021-12-28 03:16:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:33,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:16:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:16:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 03:16:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:16:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 03:16:33,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121436893] [2021-12-28 03:16:33,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121436893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:33,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:33,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:16:33,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431277094] [2021-12-28 03:16:33,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:33,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:16:33,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:16:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:16:33,657 INFO L87 Difference]: Start difference. First operand 163 states and 214 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:16:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:33,698 INFO L93 Difference]: Finished difference Result 218 states and 281 transitions. [2021-12-28 03:16:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:16:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2021-12-28 03:16:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:33,699 INFO L225 Difference]: With dead ends: 218 [2021-12-28 03:16:33,700 INFO L226 Difference]: Without dead ends: 163 [2021-12-28 03:16:33,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:16:33,700 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 16 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:33,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 363 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:16:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-28 03:16:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-28 03:16:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 116 states have internal predecessors, (132), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (45), 32 states have call predecessors, (45), 33 states have call successors, (45) [2021-12-28 03:16:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2021-12-28 03:16:33,712 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 65 [2021-12-28 03:16:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:33,713 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2021-12-28 03:16:33,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 03:16:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2021-12-28 03:16:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 03:16:33,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:33,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-12-28 03:16:33,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:16:33,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1635963807, now seen corresponding path program 1 times [2021-12-28 03:16:33,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:33,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764753817] [2021-12-28 03:16:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:33,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:16:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 03:16:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:16:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:16:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:16:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 03:16:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:16:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-28 03:16:33,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764753817] [2021-12-28 03:16:33,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764753817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:16:33,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:16:33,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:16:33,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559155118] [2021-12-28 03:16:33,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:16:33,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:16:33,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:16:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:16:33,899 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:16:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:16:33,960 INFO L93 Difference]: Finished difference Result 171 states and 221 transitions. [2021-12-28 03:16:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:16:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 67 [2021-12-28 03:16:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:16:33,962 INFO L225 Difference]: With dead ends: 171 [2021-12-28 03:16:33,962 INFO L226 Difference]: Without dead ends: 169 [2021-12-28 03:16:33,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:16:33,971 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 15 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:16:33,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 693 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:16:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-28 03:16:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-12-28 03:16:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 115 states have (on average 1.173913043478261) internal successors, (135), 119 states have internal predecessors, (135), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (46), 33 states have call predecessors, (46), 34 states have call successors, (46) [2021-12-28 03:16:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 218 transitions. [2021-12-28 03:16:33,982 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 218 transitions. Word has length 67 [2021-12-28 03:16:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:16:33,983 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 218 transitions. [2021-12-28 03:16:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:16:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 218 transitions. [2021-12-28 03:16:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 03:16:33,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:16:33,984 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:16:33,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:16:33,985 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:16:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:16:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash 701340153, now seen corresponding path program 1 times [2021-12-28 03:16:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:16:33,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272359174] [2021-12-28 03:16:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:33,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:16:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:16:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:16:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:16:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:16:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-28 03:16:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:16:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:16:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:16:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:16:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:16:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272359174] [2021-12-28 03:16:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272359174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179310717] [2021-12-28 03:16:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:16:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:16:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:16:34,464 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) [2021-12-28 03:16:34,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:16:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:16:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-28 03:16:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:16:34,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:16:34,999 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 03:16:34,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 03:16:35,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:16:36,108 INFO L353 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-12-28 03:16:36,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-12-28 03:16:36,163 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-28 03:16:36,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-28 03:16:38,612 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 03:16:38,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 03:16:38,652 INFO L387 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 23 treesize of output 23 [2021-12-28 03:16:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 03:16:48,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:16:48,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_778 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_byte_cursor_advance_~#rv~6#1.base| v_ArrVal_778) |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.base|) (+ |c_ULTIMATE.start_aws_byte_cursor_advance_~cursor#1.offset| 8)) 0))) is different from false [2021-12-28 03:16:48,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179310717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:16:48,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:16:48,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-12-28 03:16:48,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469584019] [2021-12-28 03:16:48,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 03:16:48,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-28 03:16:48,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:16:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-28 03:16:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1410, Unknown=5, NotChecked=76, Total=1640 [2021-12-28 03:16:48,629 INFO L87 Difference]: Start difference. First operand 168 states and 218 transitions. Second operand has 34 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 12 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16)