./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 01:00:43,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 01:00:43,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 01:00:43,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 01:00:43,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 01:00:43,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 01:00:43,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 01:00:43,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 01:00:43,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 01:00:43,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 01:00:43,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 01:00:43,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 01:00:43,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 01:00:43,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 01:00:43,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 01:00:43,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 01:00:43,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 01:00:43,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 01:00:43,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 01:00:43,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 01:00:43,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 01:00:43,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 01:00:43,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 01:00:43,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 01:00:43,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 01:00:43,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 01:00:43,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 01:00:43,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 01:00:43,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 01:00:43,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 01:00:43,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 01:00:43,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 01:00:43,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 01:00:43,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 01:00:43,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 01:00:43,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 01:00:43,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 01:00:43,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 01:00:43,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 01:00:43,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 01:00:43,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 01:00:43,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 01:00:43,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 01:00:43,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 01:00:43,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 01:00:43,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 01:00:43,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 01:00:43,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 01:00:43,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 01:00:43,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 01:00:43,105 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 01:00:43,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 01:00:43,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 01:00:43,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 01:00:43,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 01:00:43,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 01:00:43,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 01:00:43,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 01:00:43,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 01:00:43,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 01:00:43,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 01:00:43,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 01:00:43,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 01:00:43,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-12-18 01:00:43,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 01:00:43,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 01:00:43,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 01:00:43,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 01:00:43,342 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 01:00:43,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-12-18 01:00:43,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9827388c/4787842374584b809c801e78c039b936/FLAGc8d9cad5d [2021-12-18 01:00:43,980 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 01:00:43,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-12-18 01:00:44,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9827388c/4787842374584b809c801e78c039b936/FLAGc8d9cad5d [2021-12-18 01:00:44,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9827388c/4787842374584b809c801e78c039b936 [2021-12-18 01:00:44,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 01:00:44,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 01:00:44,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 01:00:44,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 01:00:44,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 01:00:44,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 01:00:44" (1/1) ... [2021-12-18 01:00:44,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc1761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:44, skipping insertion in model container [2021-12-18 01:00:44,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 01:00:44" (1/1) ... [2021-12-18 01:00:44,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 01:00:44,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 01:00:44,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-12-18 01:00:44,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-12-18 01:00:45,125 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,131 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,132 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,133 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,134 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,146 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,152 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,153 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,154 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 01:00:45,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 01:00:45,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 01:00:45,334 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 01:00:45,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 01:00:45,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 01:00:45,336 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 01:00:45,336 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 01:00:45,336 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 01:00:45,337 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 01:00:45,417 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 01:00:45,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 01:00:45,455 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 01:00:45,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-12-18 01:00:45,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-12-18 01:00:45,509 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,526 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,526 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,535 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 01:00:45,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 01:00:45,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 01:00:45,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 01:00:45,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 01:00:45,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 01:00:45,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 01:00:45,570 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 01:00:45,570 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 01:00:45,570 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 01:00:45,571 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 01:00:45,589 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 01:00:45,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 01:00:45,741 INFO L208 MainTranslator]: Completed translation [2021-12-18 01:00:45,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45 WrapperNode [2021-12-18 01:00:45,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 01:00:45,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 01:00:45,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 01:00:45,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 01:00:45,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,847 INFO L137 Inliner]: procedures = 679, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 214 [2021-12-18 01:00:45,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 01:00:45,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 01:00:45,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 01:00:45,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 01:00:45,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 01:00:45,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 01:00:45,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 01:00:45,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 01:00:45,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (1/1) ... [2021-12-18 01:00:45,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 01:00:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:45,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 01:00:45,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 01:00:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-12-18 01:00:45,995 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-12-18 01:00:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 01:00:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 01:00:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 01:00:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-18 01:00:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-18 01:00:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-12-18 01:00:45,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-12-18 01:00:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 01:00:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-18 01:00:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-18 01:00:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 01:00:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 01:00:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 01:00:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 01:00:46,000 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-18 01:00:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-18 01:00:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 01:00:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 01:00:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 01:00:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 01:00:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 01:00:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 01:00:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 01:00:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 01:00:46,224 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 01:00:46,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 01:00:46,551 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 01:00:46,558 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 01:00:46,558 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 01:00:46,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 01:00:46 BoogieIcfgContainer [2021-12-18 01:00:46,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 01:00:46,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 01:00:46,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 01:00:46,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 01:00:46,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 01:00:44" (1/3) ... [2021-12-18 01:00:46,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595cab12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 01:00:46, skipping insertion in model container [2021-12-18 01:00:46,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 01:00:45" (2/3) ... [2021-12-18 01:00:46,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595cab12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 01:00:46, skipping insertion in model container [2021-12-18 01:00:46,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 01:00:46" (3/3) ... [2021-12-18 01:00:46,568 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-12-18 01:00:46,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 01:00:46,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 01:00:46,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 01:00:46,632 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 01:00:46,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 01:00:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-18 01:00:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:46,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:46,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:46,690 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2021-12-18 01:00:46,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:46,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976139385] [2021-12-18 01:00:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:46,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-18 01:00:47,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976139385] [2021-12-18 01:00:47,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976139385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:47,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:00:47,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 01:00:47,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343074550] [2021-12-18 01:00:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 01:00:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 01:00:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 01:00:47,373 INFO L87 Difference]: Start difference. First operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:47,637 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2021-12-18 01:00:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 01:00:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-18 01:00:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:47,648 INFO L225 Difference]: With dead ends: 225 [2021-12-18 01:00:47,648 INFO L226 Difference]: Without dead ends: 107 [2021-12-18 01:00:47,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 01:00:47,660 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:47,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 162 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:00:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-18 01:00:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-18 01:00:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-18 01:00:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2021-12-18 01:00:47,716 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2021-12-18 01:00:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:47,717 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2021-12-18 01:00:47,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2021-12-18 01:00:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:47,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:47,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:47,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 01:00:47,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2021-12-18 01:00:47,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:47,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056601361] [2021-12-18 01:00:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:47,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-18 01:00:48,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056601361] [2021-12-18 01:00:48,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056601361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:48,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224771026] [2021-12-18 01:00:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:48,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:48,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:48,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 01:00:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 01:00:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-18 01:00:48,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224771026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:48,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:48,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-18 01:00:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541406693] [2021-12-18 01:00:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:48,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 01:00:48,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 01:00:48,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 01:00:48,556 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:48,596 INFO L93 Difference]: Finished difference Result 207 states and 299 transitions. [2021-12-18 01:00:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 01:00:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-18 01:00:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:48,600 INFO L225 Difference]: With dead ends: 207 [2021-12-18 01:00:48,601 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 01:00:48,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 01:00:48,602 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 21 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 431 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:00:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 01:00:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-12-18 01:00:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 70 states have internal predecessors, (83), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-18 01:00:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 149 transitions. [2021-12-18 01:00:48,625 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 149 transitions. Word has length 101 [2021-12-18 01:00:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:48,627 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 149 transitions. [2021-12-18 01:00:48,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 149 transitions. [2021-12-18 01:00:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:48,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:48,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:48,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:48,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1370013829, now seen corresponding path program 1 times [2021-12-18 01:00:48,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:48,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418000960] [2021-12-18 01:00:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:48,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:48,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:49,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418000960] [2021-12-18 01:00:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418000960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290602576] [2021-12-18 01:00:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:49,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:49,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 01:00:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 01:00:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-18 01:00:49,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290602576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:49,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:49,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-18 01:00:49,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906547162] [2021-12-18 01:00:49,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 01:00:49,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 01:00:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 01:00:49,499 INFO L87 Difference]: Start difference. First operand 109 states and 149 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:49,533 INFO L93 Difference]: Finished difference Result 207 states and 297 transitions. [2021-12-18 01:00:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 01:00:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-18 01:00:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:49,535 INFO L225 Difference]: With dead ends: 207 [2021-12-18 01:00:49,535 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 01:00:49,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-18 01:00:49,536 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 12 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:49,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 428 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:00:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 01:00:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2021-12-18 01:00:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.25) internal successors, (85), 72 states have internal predecessors, (85), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-18 01:00:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2021-12-18 01:00:49,544 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 101 [2021-12-18 01:00:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:49,545 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2021-12-18 01:00:49,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2021-12-18 01:00:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:49,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:49,546 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:49,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 01:00:49,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-18 01:00:49,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash 38908607, now seen corresponding path program 1 times [2021-12-18 01:00:49,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063157306] [2021-12-18 01:00:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:49,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:49,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063157306] [2021-12-18 01:00:49,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063157306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481576389] [2021-12-18 01:00:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:49,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:49,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:49,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 01:00:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 01:00:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 01:00:50,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481576389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:50,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:50,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-18 01:00:50,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168609383] [2021-12-18 01:00:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 01:00:50,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 01:00:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 01:00:50,429 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:50,455 INFO L93 Difference]: Finished difference Result 207 states and 295 transitions. [2021-12-18 01:00:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 01:00:50,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-18 01:00:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:50,457 INFO L225 Difference]: With dead ends: 207 [2021-12-18 01:00:50,457 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 01:00:50,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-18 01:00:50,459 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 3 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:50,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 427 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:00:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 01:00:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-12-18 01:00:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-18 01:00:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2021-12-18 01:00:50,467 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 101 [2021-12-18 01:00:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2021-12-18 01:00:50,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2021-12-18 01:00:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:50,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:50,469 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:50,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 01:00:50,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:50,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1759122567, now seen corresponding path program 1 times [2021-12-18 01:00:50,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620330595] [2021-12-18 01:00:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:50,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:50,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620330595] [2021-12-18 01:00:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620330595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547501048] [2021-12-18 01:00:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:50,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:50,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:50,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 01:00:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 01:00:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-18 01:00:51,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:51,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547501048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:51,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:51,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-18 01:00:51,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189824072] [2021-12-18 01:00:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:51,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 01:00:51,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 01:00:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:00:51,613 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:51,843 INFO L93 Difference]: Finished difference Result 216 states and 298 transitions. [2021-12-18 01:00:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 01:00:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-12-18 01:00:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:51,846 INFO L225 Difference]: With dead ends: 216 [2021-12-18 01:00:51,847 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 01:00:51,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 01:00:51,848 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 176 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:51,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 411 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:00:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 01:00:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-18 01:00:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2021-12-18 01:00:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2021-12-18 01:00:51,860 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 101 [2021-12-18 01:00:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:51,861 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2021-12-18 01:00:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2021-12-18 01:00:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:51,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:51,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:51,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:52,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1159297143, now seen corresponding path program 1 times [2021-12-18 01:00:52,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:52,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405495728] [2021-12-18 01:00:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:52,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:52,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405495728] [2021-12-18 01:00:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405495728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908920572] [2021-12-18 01:00:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:52,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:52,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:52,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 01:00:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 01:00:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 01:00:52,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908920572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:52,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:52,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-18 01:00:52,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470237818] [2021-12-18 01:00:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 01:00:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 01:00:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:00:52,836 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:53,034 INFO L93 Difference]: Finished difference Result 220 states and 299 transitions. [2021-12-18 01:00:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 01:00:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-12-18 01:00:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:53,037 INFO L225 Difference]: With dead ends: 220 [2021-12-18 01:00:53,037 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 01:00:53,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 01:00:53,039 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 175 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:53,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 415 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:00:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 01:00:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-18 01:00:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2021-12-18 01:00:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2021-12-18 01:00:53,052 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 101 [2021-12-18 01:00:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:53,053 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2021-12-18 01:00:53,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2021-12-18 01:00:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 01:00:53,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:53,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:53,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:53,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:53,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1251856495, now seen corresponding path program 1 times [2021-12-18 01:00:53,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598584972] [2021-12-18 01:00:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:53,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-18 01:00:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 01:00:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 01:00:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-18 01:00:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:00:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-18 01:00:53,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598584972] [2021-12-18 01:00:53,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598584972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:53,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142697149] [2021-12-18 01:00:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:53,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:53,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:53,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:53,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 01:00:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 01:00:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 01:00:54,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:54,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142697149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:54,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:54,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 12 [2021-12-18 01:00:54,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815985448] [2021-12-18 01:00:54,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:54,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 01:00:54,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 01:00:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:00:54,171 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-18 01:00:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:54,531 INFO L93 Difference]: Finished difference Result 225 states and 307 transitions. [2021-12-18 01:00:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 01:00:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 101 [2021-12-18 01:00:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:54,533 INFO L225 Difference]: With dead ends: 225 [2021-12-18 01:00:54,533 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 01:00:54,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-18 01:00:54,534 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 158 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:54,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 646 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 01:00:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 01:00:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-18 01:00:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 84 states have internal predecessors, (95), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (39), 32 states have call predecessors, (39), 32 states have call successors, (39) [2021-12-18 01:00:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2021-12-18 01:00:54,544 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 101 [2021-12-18 01:00:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:54,544 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2021-12-18 01:00:54,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-18 01:00:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2021-12-18 01:00:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 01:00:54,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:54,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:54,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:54,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:54,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -657271923, now seen corresponding path program 1 times [2021-12-18 01:00:54,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215305681] [2021-12-18 01:00:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:54,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 01:00:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 01:00:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 01:00:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:55,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 01:00:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:55,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:55,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 01:00:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:55,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215305681] [2021-12-18 01:00:55,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215305681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343821613] [2021-12-18 01:00:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:55,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:55,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:55,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 01:00:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 01:00:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-18 01:00:55,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343821613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:55,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-18 01:00:55,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240373945] [2021-12-18 01:00:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 01:00:55,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 01:00:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-18 01:00:55,817 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:56,111 INFO L93 Difference]: Finished difference Result 230 states and 322 transitions. [2021-12-18 01:00:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 01:00:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-12-18 01:00:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:56,112 INFO L225 Difference]: With dead ends: 230 [2021-12-18 01:00:56,113 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 01:00:56,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-18 01:00:56,114 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 184 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:56,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 557 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:00:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 01:00:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-18 01:00:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.2125) internal successors, (97), 87 states have internal predecessors, (97), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-12-18 01:00:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 174 transitions. [2021-12-18 01:00:56,120 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 174 transitions. Word has length 103 [2021-12-18 01:00:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:56,121 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 174 transitions. [2021-12-18 01:00:56,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 174 transitions. [2021-12-18 01:00:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 01:00:56,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:56,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:56,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:56,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:56,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash 76379770, now seen corresponding path program 1 times [2021-12-18 01:00:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:56,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201312667] [2021-12-18 01:00:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:56,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-18 01:00:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 01:00:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:00:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 01:00:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 01:00:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-18 01:00:56,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201312667] [2021-12-18 01:00:56,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201312667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153242449] [2021-12-18 01:00:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:56,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:56,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:56,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 01:00:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 01:00:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-18 01:00:57,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153242449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:57,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-18 01:00:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594304944] [2021-12-18 01:00:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:57,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 01:00:57,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 01:00:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-18 01:00:57,226 INFO L87 Difference]: Start difference. First operand 126 states and 174 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:57,576 INFO L93 Difference]: Finished difference Result 245 states and 353 transitions. [2021-12-18 01:00:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 01:00:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-12-18 01:00:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:57,578 INFO L225 Difference]: With dead ends: 245 [2021-12-18 01:00:57,578 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 01:00:57,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-18 01:00:57,579 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 221 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:57,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 646 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 01:00:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 01:00:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2021-12-18 01:00:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 89 states have internal predecessors, (100), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-12-18 01:00:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2021-12-18 01:00:57,585 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 105 [2021-12-18 01:00:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:57,585 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2021-12-18 01:00:57,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 01:00:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2021-12-18 01:00:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 01:00:57,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:57,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:57,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:57,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-18 01:00:57,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1876687072, now seen corresponding path program 1 times [2021-12-18 01:00:57,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:57,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794854530] [2021-12-18 01:00:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:57,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 01:00:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 01:00:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 01:00:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:00:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 01:00:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-18 01:00:58,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794854530] [2021-12-18 01:00:58,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794854530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109972500] [2021-12-18 01:00:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:58,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:58,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:58,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 01:00:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 01:00:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:00:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 01:00:58,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:00:58,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109972500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:00:58,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:00:58,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-18 01:00:58,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909727905] [2021-12-18 01:00:58,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:00:58,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 01:00:58,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:00:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 01:00:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 01:00:58,759 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:00:58,778 INFO L93 Difference]: Finished difference Result 246 states and 361 transitions. [2021-12-18 01:00:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 01:00:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-18 01:00:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:00:58,780 INFO L225 Difference]: With dead ends: 246 [2021-12-18 01:00:58,780 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 01:00:58,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 01:00:58,781 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:00:58,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 297 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:00:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 01:00:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2021-12-18 01:00:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.216867469879518) internal successors, (101), 90 states have internal predecessors, (101), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-12-18 01:00:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-12-18 01:00:58,792 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 106 [2021-12-18 01:00:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:00:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-12-18 01:00:58,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-18 01:00:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-12-18 01:00:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-18 01:00:58,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:00:58,795 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:00:58,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 01:00:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 01:00:59,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:00:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:00:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1115937726, now seen corresponding path program 1 times [2021-12-18 01:00:59,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:00:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705887800] [2021-12-18 01:00:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:00:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:00:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:00:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:00:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:00:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:00:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 01:00:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 01:00:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 01:00:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 01:00:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:00:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 01:00:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-18 01:00:59,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:00:59,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705887800] [2021-12-18 01:00:59,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705887800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:00:59,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018138257] [2021-12-18 01:00:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:00:59,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:00:59,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:00:59,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:00:59,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 01:00:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:00:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 01:00:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 01:01:00,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:01:00,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018138257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:00,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:00,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2021-12-18 01:01:00,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752305196] [2021-12-18 01:01:00,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:00,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 01:01:00,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 01:01:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 01:01:00,120 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 01:01:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:00,434 INFO L93 Difference]: Finished difference Result 245 states and 348 transitions. [2021-12-18 01:01:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 01:01:00,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2021-12-18 01:01:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:00,436 INFO L225 Difference]: With dead ends: 245 [2021-12-18 01:01:00,436 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 01:01:00,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-18 01:01:00,438 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:00,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 761 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:01:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 01:01:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-12-18 01:01:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 91 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-12-18 01:01:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2021-12-18 01:01:00,444 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 114 [2021-12-18 01:01:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:00,445 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2021-12-18 01:01:00,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-18 01:01:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2021-12-18 01:01:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 01:01:00,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:00,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:00,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:00,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-18 01:01:00,652 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1680174575, now seen corresponding path program 1 times [2021-12-18 01:01:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:00,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199758656] [2021-12-18 01:01:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:00,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 01:01:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 01:01:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 01:01:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 01:01:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 01:01:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-18 01:01:00,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199758656] [2021-12-18 01:01:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199758656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026108456] [2021-12-18 01:01:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:00,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:00,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:00,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:01,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 01:01:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 01:01:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 01:01:02,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:02,356 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-18 01:01:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 01:01:02,362 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-12-18 01:01:02,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 01:01:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-18 01:01:02,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026108456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:01:02,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:01:02,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 20 [2021-12-18 01:01:02,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899683297] [2021-12-18 01:01:02,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:02,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 01:01:02,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 01:01:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-12-18 01:01:02,441 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-18 01:01:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:04,307 INFO L93 Difference]: Finished difference Result 289 states and 459 transitions. [2021-12-18 01:01:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 01:01:04,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2021-12-18 01:01:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:04,312 INFO L225 Difference]: With dead ends: 289 [2021-12-18 01:01:04,312 INFO L226 Difference]: Without dead ends: 178 [2021-12-18 01:01:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 01:01:04,334 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 287 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:04,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1027 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-18 01:01:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-18 01:01:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 141. [2021-12-18 01:01:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 9 states have call predecessors, (35), 12 states have return successors, (45), 33 states have call predecessors, (45), 33 states have call successors, (45) [2021-12-18 01:01:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2021-12-18 01:01:04,348 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 116 [2021-12-18 01:01:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:04,349 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2021-12-18 01:01:04,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-18 01:01:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2021-12-18 01:01:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 01:01:04,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:04,350 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:04,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:04,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 01:01:04,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2021-12-18 01:01:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:04,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128492958] [2021-12-18 01:01:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:04,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:01:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:01:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-18 01:01:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 01:01:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 01:01:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 01:01:04,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128492958] [2021-12-18 01:01:04,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128492958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313114006] [2021-12-18 01:01:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:04,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:04,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 01:01:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 01:01:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 01:01:05,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 01:01:05,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313114006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:01:05,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:01:05,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 16 [2021-12-18 01:01:05,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020272733] [2021-12-18 01:01:05,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:05,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 01:01:05,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:05,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 01:01:05,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-18 01:01:05,873 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 16 states, 13 states have (on average 6.230769230769231) internal successors, (81), 11 states have internal predecessors, (81), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-18 01:01:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:06,411 INFO L93 Difference]: Finished difference Result 270 states and 378 transitions. [2021-12-18 01:01:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 01:01:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 6.230769230769231) internal successors, (81), 11 states have internal predecessors, (81), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 117 [2021-12-18 01:01:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:06,413 INFO L225 Difference]: With dead ends: 270 [2021-12-18 01:01:06,413 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 01:01:06,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-12-18 01:01:06,414 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 61 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:06,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1099 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 01:01:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 01:01:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 143. [2021-12-18 01:01:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 102 states have internal predecessors, (114), 35 states have call successors, (35), 9 states have call predecessors, (35), 13 states have return successors, (50), 33 states have call predecessors, (50), 33 states have call successors, (50) [2021-12-18 01:01:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 199 transitions. [2021-12-18 01:01:06,423 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 199 transitions. Word has length 117 [2021-12-18 01:01:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:06,424 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 199 transitions. [2021-12-18 01:01:06,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 6.230769230769231) internal successors, (81), 11 states have internal predecessors, (81), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-18 01:01:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 199 transitions. [2021-12-18 01:01:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-18 01:01:06,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:06,426 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:06,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:06,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 01:01:06,652 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1150330055, now seen corresponding path program 1 times [2021-12-18 01:01:06,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729641337] [2021-12-18 01:01:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:06,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:01:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:01:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 01:01:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 01:01:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-18 01:01:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-18 01:01:06,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729641337] [2021-12-18 01:01:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729641337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168576958] [2021-12-18 01:01:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:06,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:06,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:06,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:06,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 01:01:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:07,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 01:01:07,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-18 01:01:07,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:01:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168576958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:07,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:07,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-18 01:01:07,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914011017] [2021-12-18 01:01:07,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:07,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 01:01:07,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 01:01:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-18 01:01:07,765 INFO L87 Difference]: Start difference. First operand 143 states and 199 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-18 01:01:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:08,005 INFO L93 Difference]: Finished difference Result 264 states and 368 transitions. [2021-12-18 01:01:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 01:01:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 119 [2021-12-18 01:01:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:08,007 INFO L225 Difference]: With dead ends: 264 [2021-12-18 01:01:08,007 INFO L226 Difference]: Without dead ends: 143 [2021-12-18 01:01:08,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-18 01:01:08,008 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 183 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:08,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 565 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 01:01:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-18 01:01:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-18 01:01:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 9 states have call predecessors, (35), 12 states have return successors, (46), 33 states have call predecessors, (46), 33 states have call successors, (46) [2021-12-18 01:01:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-12-18 01:01:08,014 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 119 [2021-12-18 01:01:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:08,015 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-12-18 01:01:08,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-18 01:01:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-12-18 01:01:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 01:01:08,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:08,016 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:08,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:08,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 01:01:08,231 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1331296970, now seen corresponding path program 1 times [2021-12-18 01:01:08,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:08,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847582073] [2021-12-18 01:01:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:08,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:01:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:01:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 01:01:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 01:01:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 01:01:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-18 01:01:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847582073] [2021-12-18 01:01:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847582073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:08,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237149831] [2021-12-18 01:01:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:08,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:08,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:08,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 01:01:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 01:01:09,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 01:01:09,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 01:01:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 01:01:09,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:10,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:10,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2021-12-18 01:01:10,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:01:10,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2021-12-18 01:01:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-18 01:01:10,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237149831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:01:10,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:01:10,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 21 [2021-12-18 01:01:10,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256421694] [2021-12-18 01:01:10,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:10,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 01:01:10,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 01:01:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-12-18 01:01:10,348 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand has 21 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 11 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-18 01:01:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:13,899 INFO L93 Difference]: Finished difference Result 478 states and 789 transitions. [2021-12-18 01:01:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 01:01:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 11 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 130 [2021-12-18 01:01:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:13,902 INFO L225 Difference]: With dead ends: 478 [2021-12-18 01:01:13,902 INFO L226 Difference]: Without dead ends: 346 [2021-12-18 01:01:13,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 274 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=3544, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 01:01:13,906 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 323 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:13,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 2826 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 3097 Invalid, 0 Unknown, 525 Unchecked, 2.5s Time] [2021-12-18 01:01:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-18 01:01:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 189. [2021-12-18 01:01:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 131 states have (on average 1.2442748091603053) internal successors, (163), 137 states have internal predecessors, (163), 42 states have call successors, (42), 12 states have call predecessors, (42), 15 states have return successors, (56), 42 states have call predecessors, (56), 40 states have call successors, (56) [2021-12-18 01:01:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 261 transitions. [2021-12-18 01:01:13,949 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 261 transitions. Word has length 130 [2021-12-18 01:01:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:13,950 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 261 transitions. [2021-12-18 01:01:13,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 11 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-18 01:01:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 261 transitions. [2021-12-18 01:01:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-18 01:01:13,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:13,951 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:13,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-18 01:01:14,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:14,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2013812334, now seen corresponding path program 1 times [2021-12-18 01:01:14,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:14,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360597841] [2021-12-18 01:01:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:14,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:01:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 01:01:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-18 01:01:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-18 01:01:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 01:01:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 01:01:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-18 01:01:14,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360597841] [2021-12-18 01:01:14,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360597841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176582018] [2021-12-18 01:01:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:14,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:14,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:14,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 01:01:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:15,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 01:01:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 01:01:15,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 01:01:15,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176582018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:01:15,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 01:01:15,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-18 01:01:15,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262876234] [2021-12-18 01:01:15,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:01:15,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 01:01:15,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 01:01:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:01:15,617 INFO L87 Difference]: Start difference. First operand 189 states and 261 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-18 01:01:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:01:15,634 INFO L93 Difference]: Finished difference Result 362 states and 524 transitions. [2021-12-18 01:01:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 01:01:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 143 [2021-12-18 01:01:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:01:15,636 INFO L225 Difference]: With dead ends: 362 [2021-12-18 01:01:15,636 INFO L226 Difference]: Without dead ends: 190 [2021-12-18 01:01:15,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:01:15,637 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 0 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 01:01:15,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 582 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 01:01:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-18 01:01:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-12-18 01:01:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 138 states have internal predecessors, (159), 42 states have call successors, (42), 12 states have call predecessors, (42), 16 states have return successors, (56), 41 states have call predecessors, (56), 40 states have call successors, (56) [2021-12-18 01:01:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 257 transitions. [2021-12-18 01:01:15,650 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 257 transitions. Word has length 143 [2021-12-18 01:01:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:01:15,651 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 257 transitions. [2021-12-18 01:01:15,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-18 01:01:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 257 transitions. [2021-12-18 01:01:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-18 01:01:15,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:01:15,652 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:01:15,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 01:01:15,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 01:01:15,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:01:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:01:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1992797946, now seen corresponding path program 2 times [2021-12-18 01:01:15,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:01:15,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554142463] [2021-12-18 01:01:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:01:15,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:01:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:01:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:01:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:01:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:01:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:01:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 01:01:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 01:01:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:01:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 01:01:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 01:01:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:01:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-18 01:01:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:01:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-18 01:01:16,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:01:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554142463] [2021-12-18 01:01:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554142463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465347824] [2021-12-18 01:01:16,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 01:01:16,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:01:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:01:16,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:01:16,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 01:01:17,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 01:01:17,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:01:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-18 01:01:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:01:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 01:01:17,522 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 01:01:17,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 01:01:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:01:17,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 01:01:17,692 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_12723 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_12723))) (exists ((v_ArrVal_12724 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_12724)))) is different from true [2021-12-18 01:01:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 01:01:17,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 01:01:48,362 WARN L227 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:01:58,509 WARN L227 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:01:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 87 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 2 not checked. [2021-12-18 01:01:58,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:01:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465347824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:01:59,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 01:01:59,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 32 [2021-12-18 01:01:59,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285884686] [2021-12-18 01:01:59,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 01:01:59,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 01:01:59,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:01:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 01:01:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1492, Unknown=11, NotChecked=78, Total=1722 [2021-12-18 01:01:59,748 INFO L87 Difference]: Start difference. First operand 189 states and 257 transitions. Second operand has 32 states, 28 states have (on average 4.714285714285714) internal successors, (132), 27 states have internal predecessors, (132), 14 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-18 01:02:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:02:11,032 INFO L93 Difference]: Finished difference Result 442 states and 618 transitions. [2021-12-18 01:02:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 01:02:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.714285714285714) internal successors, (132), 27 states have internal predecessors, (132), 14 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 14 states have call successors, (28) Word has length 144 [2021-12-18 01:02:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:02:11,034 INFO L225 Difference]: With dead ends: 442 [2021-12-18 01:02:11,034 INFO L226 Difference]: Without dead ends: 280 [2021-12-18 01:02:11,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=241, Invalid=2399, Unknown=16, NotChecked=100, Total=2756 [2021-12-18 01:02:11,036 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 247 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 01:02:11,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1292 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 768 Invalid, 0 Unknown, 638 Unchecked, 0.8s Time] [2021-12-18 01:02:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-18 01:02:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 235. [2021-12-18 01:02:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 165 states have (on average 1.2) internal successors, (198), 174 states have internal predecessors, (198), 50 states have call successors, (50), 15 states have call predecessors, (50), 19 states have return successors, (69), 48 states have call predecessors, (69), 48 states have call successors, (69) [2021-12-18 01:02:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2021-12-18 01:02:11,053 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 144 [2021-12-18 01:02:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:02:11,053 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2021-12-18 01:02:11,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.714285714285714) internal successors, (132), 27 states have internal predecessors, (132), 14 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-18 01:02:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2021-12-18 01:02:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 01:02:11,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:02:11,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:02:11,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 01:02:11,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 01:02:11,279 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:02:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:02:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash 384003580, now seen corresponding path program 1 times [2021-12-18 01:02:11,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:02:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475104700] [2021-12-18 01:02:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:02:11,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:02:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:11,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:02:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:11,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:02:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:11,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:02:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:11,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:02:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:02:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:02:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 01:02:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:02:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:02:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:02:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:02:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:02:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:02:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:02:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:02:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 01:02:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-18 01:02:15,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:02:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475104700] [2021-12-18 01:02:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475104700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:02:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139596937] [2021-12-18 01:02:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:02:15,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:02:15,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:02:15,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:02:15,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 01:02:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:02:16,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 01:02:16,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:02:16,118 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:02:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:02:16,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:02:16,369 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:02:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 01:02:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:02:16,463 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-18 01:02:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 64 [2021-12-18 01:02:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-18 01:02:16,481 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-12-18 01:02:16,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 26 treesize of output 30 [2021-12-18 01:02:16,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-18 01:02:16,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-18 01:02:16,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 01:02:16,614 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 01:02:16,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-18 01:02:18,702 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_15| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_15|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_15|))) is different from true [2021-12-18 01:02:20,821 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_16| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_16|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_16|))) is different from true [2021-12-18 01:02:22,877 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_17| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_17|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_17|))) is different from true [2021-12-18 01:02:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 44 not checked. [2021-12-18 01:02:33,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:02:35,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:02:35,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-18 01:02:35,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-12-18 01:02:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:02:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 01:02:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-18 01:02:36,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:02:36,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-18 01:02:36,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:02:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 309 treesize of output 287 [2021-12-18 01:02:36,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2021-12-18 01:02:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2021-12-18 01:02:36,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-18 01:02:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:02:36,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:02:36,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 66 [2021-12-18 01:02:38,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139596937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:02:38,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 01:02:38,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2021-12-18 01:02:38,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802076758] [2021-12-18 01:02:38,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 01:02:38,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 01:02:38,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:02:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 01:02:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1442, Unknown=10, NotChecked=234, Total=1806 [2021-12-18 01:02:38,325 INFO L87 Difference]: Start difference. First operand 235 states and 317 transitions. Second operand has 31 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2021-12-18 01:03:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:02,635 INFO L93 Difference]: Finished difference Result 527 states and 753 transitions. [2021-12-18 01:03:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 01:03:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) Word has length 146 [2021-12-18 01:03:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:02,640 INFO L225 Difference]: With dead ends: 527 [2021-12-18 01:03:02,640 INFO L226 Difference]: Without dead ends: 416 [2021-12-18 01:03:02,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 266 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=256, Invalid=2824, Unknown=12, NotChecked=330, Total=3422 [2021-12-18 01:03:02,642 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 199 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2463 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:02,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1545 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2827 Invalid, 0 Unknown, 2463 Unchecked, 6.1s Time] [2021-12-18 01:03:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-18 01:03:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 326. [2021-12-18 01:03:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 238 states have (on average 1.218487394957983) internal successors, (290), 250 states have internal predecessors, (290), 59 states have call successors, (59), 22 states have call predecessors, (59), 28 states have return successors, (92), 56 states have call predecessors, (92), 57 states have call successors, (92) [2021-12-18 01:03:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 441 transitions. [2021-12-18 01:03:02,689 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 441 transitions. Word has length 146 [2021-12-18 01:03:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:02,689 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 441 transitions. [2021-12-18 01:03:02,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 14 states have call successors, (30), 7 states have call predecessors, (30), 10 states have return successors, (29), 15 states have call predecessors, (29), 14 states have call successors, (29) [2021-12-18 01:03:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 441 transitions. [2021-12-18 01:03:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-18 01:03:02,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:02,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:02,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-18 01:03:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 01:03:02,911 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash 207592568, now seen corresponding path program 2 times [2021-12-18 01:03:02,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:02,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811901287] [2021-12-18 01:03:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:02,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 01:03:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-18 01:03:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:03:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 01:03:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 01:03:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 01:03:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 01:03:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-18 01:03:03,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:03,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811901287] [2021-12-18 01:03:03,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811901287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:03:03,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745104833] [2021-12-18 01:03:03,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 01:03:03,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:03:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:03:03,797 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:03:03,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 01:03:05,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 01:03:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:03:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 01:03:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:03:05,507 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-12-18 01:03:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-18 01:03:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:03:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 01:03:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-18 01:03:06,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:03:17,113 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 01:03:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745104833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:03:17,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 01:03:17,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-12-18 01:03:17,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999070799] [2021-12-18 01:03:17,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 01:03:17,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 01:03:17,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 01:03:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1505, Unknown=1, NotChecked=0, Total=1640 [2021-12-18 01:03:17,126 INFO L87 Difference]: Start difference. First operand 326 states and 441 transitions. Second operand has 35 states, 31 states have (on average 4.258064516129032) internal successors, (132), 29 states have internal predecessors, (132), 15 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (27), 18 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-18 01:03:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:19,233 INFO L93 Difference]: Finished difference Result 649 states and 903 transitions. [2021-12-18 01:03:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 01:03:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 4.258064516129032) internal successors, (132), 29 states have internal predecessors, (132), 15 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (27), 18 states have call predecessors, (27), 15 states have call successors, (27) Word has length 146 [2021-12-18 01:03:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:19,236 INFO L225 Difference]: With dead ends: 649 [2021-12-18 01:03:19,236 INFO L226 Difference]: Without dead ends: 506 [2021-12-18 01:03:19,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=273, Invalid=3886, Unknown=1, NotChecked=0, Total=4160 [2021-12-18 01:03:19,238 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 124 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1006 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:19,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2188 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2236 Invalid, 0 Unknown, 1006 Unchecked, 1.4s Time] [2021-12-18 01:03:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-18 01:03:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 425. [2021-12-18 01:03:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 312 states have (on average 1.1955128205128205) internal successors, (373), 323 states have internal predecessors, (373), 75 states have call successors, (75), 30 states have call predecessors, (75), 37 states have return successors, (112), 74 states have call predecessors, (112), 73 states have call successors, (112) [2021-12-18 01:03:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 560 transitions. [2021-12-18 01:03:19,263 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 560 transitions. Word has length 146 [2021-12-18 01:03:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:19,263 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 560 transitions. [2021-12-18 01:03:19,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 4.258064516129032) internal successors, (132), 29 states have internal predecessors, (132), 15 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (27), 18 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-18 01:03:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 560 transitions. [2021-12-18 01:03:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-18 01:03:19,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:19,265 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:19,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-18 01:03:19,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:03:19,479 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash 520844414, now seen corresponding path program 3 times [2021-12-18 01:03:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:19,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546532164] [2021-12-18 01:03:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:19,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 01:03:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:03:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 01:03:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 01:03:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 01:03:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 01:03:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 01:03:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-18 01:03:19,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546532164] [2021-12-18 01:03:19,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546532164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:03:19,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018873908] [2021-12-18 01:03:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 01:03:19,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:03:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:03:19,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:03:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 01:03:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 01:03:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:03:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-18 01:03:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:03:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 01:03:27,467 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:03:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:03:27,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:03:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:03:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-18 01:03:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:03:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-18 01:03:29,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018873908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 01:03:29,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 01:03:29,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 11] total 40 [2021-12-18 01:03:29,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763218981] [2021-12-18 01:03:29,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 01:03:29,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 01:03:29,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 01:03:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 01:03:29,101 INFO L87 Difference]: Start difference. First operand 425 states and 560 transitions. Second operand has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 35 states have internal predecessors, (141), 18 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-18 01:03:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:32,353 INFO L93 Difference]: Finished difference Result 731 states and 1026 transitions. [2021-12-18 01:03:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 01:03:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 35 states have internal predecessors, (141), 18 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) Word has length 148 [2021-12-18 01:03:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:32,384 INFO L225 Difference]: With dead ends: 731 [2021-12-18 01:03:32,384 INFO L226 Difference]: Without dead ends: 609 [2021-12-18 01:03:32,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=3919, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 01:03:32,387 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 315 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 4737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:32,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 2061 Invalid, 4737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 4204 Invalid, 0 Unknown, 242 Unchecked, 2.5s Time] [2021-12-18 01:03:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-12-18 01:03:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 457. [2021-12-18 01:03:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 336 states have (on average 1.1904761904761905) internal successors, (400), 347 states have internal predecessors, (400), 78 states have call successors, (78), 32 states have call predecessors, (78), 42 states have return successors, (119), 80 states have call predecessors, (119), 76 states have call successors, (119) [2021-12-18 01:03:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 597 transitions. [2021-12-18 01:03:32,417 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 597 transitions. Word has length 148 [2021-12-18 01:03:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:32,417 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 597 transitions. [2021-12-18 01:03:32,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 35 states have internal predecessors, (141), 18 states have call successors, (37), 4 states have call predecessors, (37), 10 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-18 01:03:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 597 transitions. [2021-12-18 01:03:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 01:03:32,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:32,420 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:32,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 01:03:32,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:03:32,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash -338985069, now seen corresponding path program 1 times [2021-12-18 01:03:32,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:32,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909003813] [2021-12-18 01:03:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:32,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:03:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:03:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:03:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 01:03:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 01:03:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 01:03:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 01:03:32,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:32,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909003813] [2021-12-18 01:03:32,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909003813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:32,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:32,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 01:03:32,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878016988] [2021-12-18 01:03:32,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 01:03:32,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 01:03:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 01:03:32,814 INFO L87 Difference]: Start difference. First operand 457 states and 597 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-18 01:03:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:33,266 INFO L93 Difference]: Finished difference Result 592 states and 784 transitions. [2021-12-18 01:03:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 01:03:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 140 [2021-12-18 01:03:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:33,279 INFO L225 Difference]: With dead ends: 592 [2021-12-18 01:03:33,280 INFO L226 Difference]: Without dead ends: 470 [2021-12-18 01:03:33,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-18 01:03:33,282 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 108 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:33,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 574 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 01:03:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-18 01:03:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-12-18 01:03:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 342 states have (on average 1.1871345029239766) internal successors, (406), 354 states have internal predecessors, (406), 83 states have call successors, (83), 33 states have call predecessors, (83), 44 states have return successors, (128), 85 states have call predecessors, (128), 81 states have call successors, (128) [2021-12-18 01:03:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 617 transitions. [2021-12-18 01:03:33,306 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 617 transitions. Word has length 140 [2021-12-18 01:03:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:33,306 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 617 transitions. [2021-12-18 01:03:33,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-18 01:03:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 617 transitions. [2021-12-18 01:03:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 01:03:33,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:33,308 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:33,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 01:03:33,308 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1616340379, now seen corresponding path program 1 times [2021-12-18 01:03:33,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816780267] [2021-12-18 01:03:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:33,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:03:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:03:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:03:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 01:03:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 01:03:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 01:03:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 01:03:33,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816780267] [2021-12-18 01:03:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816780267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:33,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 01:03:33,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166174217] [2021-12-18 01:03:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 01:03:33,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 01:03:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-18 01:03:33,583 INFO L87 Difference]: Start difference. First operand 470 states and 617 transitions. Second operand has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:34,209 INFO L93 Difference]: Finished difference Result 603 states and 801 transitions. [2021-12-18 01:03:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 01:03:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2021-12-18 01:03:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:34,213 INFO L225 Difference]: With dead ends: 603 [2021-12-18 01:03:34,213 INFO L226 Difference]: Without dead ends: 472 [2021-12-18 01:03:34,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-18 01:03:34,214 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 108 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:34,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 540 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 01:03:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-18 01:03:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2021-12-18 01:03:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 343 states have (on average 1.186588921282799) internal successors, (407), 356 states have internal predecessors, (407), 83 states have call successors, (83), 33 states have call predecessors, (83), 45 states have return successors, (133), 85 states have call predecessors, (133), 81 states have call successors, (133) [2021-12-18 01:03:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 623 transitions. [2021-12-18 01:03:34,244 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 623 transitions. Word has length 140 [2021-12-18 01:03:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 623 transitions. [2021-12-18 01:03:34,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 623 transitions. [2021-12-18 01:03:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 01:03:34,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:34,247 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:34,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 01:03:34,247 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 806993753, now seen corresponding path program 1 times [2021-12-18 01:03:34,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107121782] [2021-12-18 01:03:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:34,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:03:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:03:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:03:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 01:03:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 01:03:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 01:03:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 01:03:34,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107121782] [2021-12-18 01:03:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107121782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:34,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:34,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 01:03:34,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639692455] [2021-12-18 01:03:34,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:34,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 01:03:34,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:34,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 01:03:34,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:03:34,503 INFO L87 Difference]: Start difference. First operand 472 states and 623 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:35,326 INFO L93 Difference]: Finished difference Result 608 states and 814 transitions. [2021-12-18 01:03:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 01:03:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2021-12-18 01:03:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:35,330 INFO L225 Difference]: With dead ends: 608 [2021-12-18 01:03:35,330 INFO L226 Difference]: Without dead ends: 475 [2021-12-18 01:03:35,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-12-18 01:03:35,332 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 119 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:35,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 621 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 01:03:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-18 01:03:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 473. [2021-12-18 01:03:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 344 states have (on average 1.186046511627907) internal successors, (408), 357 states have internal predecessors, (408), 83 states have call successors, (83), 33 states have call predecessors, (83), 45 states have return successors, (133), 85 states have call predecessors, (133), 81 states have call successors, (133) [2021-12-18 01:03:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 624 transitions. [2021-12-18 01:03:35,399 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 624 transitions. Word has length 140 [2021-12-18 01:03:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 624 transitions. [2021-12-18 01:03:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 624 transitions. [2021-12-18 01:03:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 01:03:35,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:35,402 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:35,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 01:03:35,402 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash 413966743, now seen corresponding path program 1 times [2021-12-18 01:03:35,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720318747] [2021-12-18 01:03:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:35,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:03:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:03:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:03:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 01:03:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 01:03:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 01:03:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 01:03:35,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:35,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720318747] [2021-12-18 01:03:35,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720318747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:35,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:35,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 01:03:35,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455479118] [2021-12-18 01:03:35,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:35,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 01:03:35,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 01:03:35,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:03:35,938 INFO L87 Difference]: Start difference. First operand 473 states and 624 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:36,723 INFO L93 Difference]: Finished difference Result 612 states and 818 transitions. [2021-12-18 01:03:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 01:03:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2021-12-18 01:03:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:36,726 INFO L225 Difference]: With dead ends: 612 [2021-12-18 01:03:36,726 INFO L226 Difference]: Without dead ends: 478 [2021-12-18 01:03:36,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-18 01:03:36,728 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 121 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:36,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 586 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 01:03:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-12-18 01:03:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 475. [2021-12-18 01:03:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 346 states have (on average 1.1849710982658959) internal successors, (410), 359 states have internal predecessors, (410), 83 states have call successors, (83), 33 states have call predecessors, (83), 45 states have return successors, (133), 85 states have call predecessors, (133), 81 states have call successors, (133) [2021-12-18 01:03:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 626 transitions. [2021-12-18 01:03:36,755 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 626 transitions. Word has length 140 [2021-12-18 01:03:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:36,756 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 626 transitions. [2021-12-18 01:03:36,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 626 transitions. [2021-12-18 01:03:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 01:03:36,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:36,758 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 01:03:36,758 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:36,758 INFO L85 PathProgramCache]: Analyzing trace with hash 672132181, now seen corresponding path program 1 times [2021-12-18 01:03:36,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:36,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163253044] [2021-12-18 01:03:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:36,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 01:03:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 01:03:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 01:03:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 01:03:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 01:03:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 01:03:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 01:03:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-18 01:03:36,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163253044] [2021-12-18 01:03:36,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163253044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:36,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:36,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 01:03:36,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554140745] [2021-12-18 01:03:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:36,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 01:03:36,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 01:03:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-18 01:03:36,978 INFO L87 Difference]: Start difference. First operand 475 states and 626 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:37,630 INFO L93 Difference]: Finished difference Result 613 states and 819 transitions. [2021-12-18 01:03:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 01:03:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2021-12-18 01:03:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:37,641 INFO L225 Difference]: With dead ends: 613 [2021-12-18 01:03:37,641 INFO L226 Difference]: Without dead ends: 477 [2021-12-18 01:03:37,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-12-18 01:03:37,644 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 131 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:37,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 630 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 01:03:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-18 01:03:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 472. [2021-12-18 01:03:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 343 states have (on average 1.186588921282799) internal successors, (407), 356 states have internal predecessors, (407), 83 states have call successors, (83), 33 states have call predecessors, (83), 45 states have return successors, (133), 85 states have call predecessors, (133), 81 states have call successors, (133) [2021-12-18 01:03:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 623 transitions. [2021-12-18 01:03:37,710 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 623 transitions. Word has length 140 [2021-12-18 01:03:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:37,711 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 623 transitions. [2021-12-18 01:03:37,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-18 01:03:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 623 transitions. [2021-12-18 01:03:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-18 01:03:37,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:37,713 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:37,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 01:03:37,714 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash -52379202, now seen corresponding path program 1 times [2021-12-18 01:03:37,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:37,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420622193] [2021-12-18 01:03:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:37,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 01:03:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:03:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 01:03:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 01:03:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:03:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-18 01:03:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 01:03:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 01:03:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 01:03:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-18 01:03:37,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:03:37,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420622193] [2021-12-18 01:03:37,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420622193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 01:03:37,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 01:03:37,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 01:03:37,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211045103] [2021-12-18 01:03:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 01:03:37,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 01:03:37,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 01:03:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 01:03:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-18 01:03:37,963 INFO L87 Difference]: Start difference. First operand 472 states and 623 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-18 01:03:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 01:03:38,545 INFO L93 Difference]: Finished difference Result 605 states and 806 transitions. [2021-12-18 01:03:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 01:03:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 157 [2021-12-18 01:03:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 01:03:38,548 INFO L225 Difference]: With dead ends: 605 [2021-12-18 01:03:38,548 INFO L226 Difference]: Without dead ends: 472 [2021-12-18 01:03:38,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-18 01:03:38,549 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 122 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 01:03:38,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 610 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 01:03:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-18 01:03:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2021-12-18 01:03:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 342 states have (on average 1.1871345029239766) internal successors, (406), 354 states have internal predecessors, (406), 83 states have call successors, (83), 33 states have call predecessors, (83), 44 states have return successors, (131), 85 states have call predecessors, (131), 81 states have call successors, (131) [2021-12-18 01:03:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 620 transitions. [2021-12-18 01:03:38,573 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 620 transitions. Word has length 157 [2021-12-18 01:03:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 01:03:38,573 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 620 transitions. [2021-12-18 01:03:38,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-18 01:03:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 620 transitions. [2021-12-18 01:03:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-18 01:03:38,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 01:03:38,575 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 01:03:38,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 01:03:38,576 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 01:03:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 01:03:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1733917871, now seen corresponding path program 4 times [2021-12-18 01:03:38,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 01:03:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855971415] [2021-12-18 01:03:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 01:03:38,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 01:03:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:38,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 01:03:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:03:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:03:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:03:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-18 01:03:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:04:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 01:04:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-18 01:04:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:04:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:04:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 01:04:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 01:04:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 01:04:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 01:04:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 01:04:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 01:04:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 01:04:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-18 01:04:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 01:04:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-18 01:04:00,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 01:04:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855971415] [2021-12-18 01:04:00,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855971415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 01:04:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883063721] [2021-12-18 01:04:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 01:04:00,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 01:04:00,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 01:04:00,991 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 01:04:00,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 01:04:02,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 01:04:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 01:04:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-18 01:04:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 01:04:02,131 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:04:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 01:04:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:04:02,442 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:04:02,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 01:04:02,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:02,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 01:04:02,470 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 01:04:02,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 01:04:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:02,586 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 01:04:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 36 [2021-12-18 01:04:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:02,601 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 01:04:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 38 [2021-12-18 01:04:02,625 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 01:04:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 36 [2021-12-18 01:04:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:02,649 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 01:04:02,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 38 [2021-12-18 01:04:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 01:04:03,092 INFO L354 Elim1Store]: treesize reduction 100, result has 31.0 percent of original size [2021-12-18 01:04:03,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 180 [2021-12-18 01:04:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,144 INFO L354 Elim1Store]: treesize reduction 72, result has 44.6 percent of original size [2021-12-18 01:04:03,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 82 [2021-12-18 01:04:03,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-18 01:04:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-12-18 01:04:03,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-12-18 01:04:03,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-18 01:04:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-18 01:04:03,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-18 01:04:03,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-18 01:04:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-18 01:04:03,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 01:04:03,993 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 01:04:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 45 treesize of output 41 [2021-12-18 01:04:04,485 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-12-18 01:04:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 180 treesize of output 165 [2021-12-18 01:04:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 107 proven. 17 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-18 01:04:07,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:04:09,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 207 [2021-12-18 01:04:09,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:09,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7486 treesize of output 7212 [2021-12-18 01:04:09,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 7206 treesize of output 5894 [2021-12-18 01:04:09,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:09,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27954 treesize of output 26110 [2021-12-18 01:04:09,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:09,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:09,630 INFO L354 Elim1Store]: treesize reduction 15, result has 89.8 percent of original size [2021-12-18 01:04:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33063 treesize of output 31396 [2021-12-18 01:04:10,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:10,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:10,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33387 treesize of output 32525 [2021-12-18 01:04:11,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:11,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 14154 treesize of output 13732 [2021-12-18 01:04:11,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:11,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:11,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:11,934 INFO L354 Elim1Store]: treesize reduction 15, result has 89.8 percent of original size [2021-12-18 01:04:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 29758 treesize of output 28261 [2021-12-18 01:04:12,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 01:04:12,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:04:12,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:04:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29844 treesize of output 29434 [2021-12-18 01:08:48,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:08:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:08:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2021-12-18 01:08:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:09:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-18 01:09:41,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2021-12-18 01:09:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:09:43,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:09:51,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2021-12-18 01:09:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2021-12-18 01:09:51,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-18 01:09:51,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:09:51,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 01:10:03,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:10:03,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 757 treesize of output 770 [2021-12-18 01:10:57,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1635 treesize of output 1577 Killed by 15