./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_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 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 20:29:56,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 20:29:56,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 20:29:56,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 20:29:56,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 20:29:56,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 20:29:56,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 20:29:56,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 20:29:56,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 20:29:56,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 20:29:56,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 20:29:56,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 20:29:56,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 20:29:56,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 20:29:56,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 20:29:56,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 20:29:56,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 20:29:56,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 20:29:56,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 20:29:56,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 20:29:56,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 20:29:56,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 20:29:56,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 20:29:56,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 20:29:56,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 20:29:56,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 20:29:56,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 20:29:56,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 20:29:56,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 20:29:56,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 20:29:56,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 20:29:56,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 20:29:56,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 20:29:56,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 20:29:56,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 20:29:56,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 20:29:56,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 20:29:56,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 20:29:56,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 20:29:56,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 20:29:56,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 20:29:56,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 20:29:56,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 20:29:56,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 20:29:56,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 20:29:56,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 20:29:56,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 20:29:56,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 20:29:56,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 20:29:56,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 20:29:56,157 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 20:29:56,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 20:29:56,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 20:29:56,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 20:29:56,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 20:29:56,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 20:29:56,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 20:29:56,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:29:56,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 20:29:56,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 20:29:56,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 20:29:56,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 20:29:56,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 20:29:56,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 [2021-11-16 20:29:56,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 20:29:56,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 20:29:56,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 20:29:56,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 20:29:56,358 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 20:29:56,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-11-16 20:29:56,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631b058b7/5290efa9ac9d4fadb42ba6639af25031/FLAGf3738f9af [2021-11-16 20:29:57,018 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 20:29:57,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-11-16 20:29:57,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631b058b7/5290efa9ac9d4fadb42ba6639af25031/FLAGf3738f9af [2021-11-16 20:29:57,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631b058b7/5290efa9ac9d4fadb42ba6639af25031 [2021-11-16 20:29:57,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 20:29:57,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 20:29:57,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 20:29:57,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 20:29:57,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 20:29:57,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:57" (1/1) ... [2021-11-16 20:29:57,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3d0d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:57, skipping insertion in model container [2021-11-16 20:29:57,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:57" (1/1) ... [2021-11-16 20:29:57,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 20:29:57,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 20:29:57,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-11-16 20:29:57,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-11-16 20:29:57,885 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:29:57,889 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:29:58,389 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,391 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,392 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,393 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,394 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,405 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,406 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,410 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,410 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,652 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:29:58,654 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:29:58,655 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:29:58,656 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:29:58,658 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:29:58,660 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:29:58,661 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:29:58,662 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:29:58,663 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:29:58,664 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:29:58,762 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:29:58,822 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,822 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:58,910 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:29:58,982 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 20:29:58,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-11-16 20:29:58,991 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-11-16 20:29:58,994 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 20:29:58,994 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 20:29:59,059 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,059 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,059 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,059 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,060 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,063 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,063 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,110 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 20:29:59,111 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 20:29:59,111 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 20:29:59,111 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 20:29:59,112 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 20:29:59,112 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 20:29:59,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 20:29:59,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 20:29:59,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 20:29:59,114 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 20:29:59,125 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 20:29:59,153 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,154 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 20:29:59,169 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 20:29:59,333 INFO L208 MainTranslator]: Completed translation [2021-11-16 20:29:59,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59 WrapperNode [2021-11-16 20:29:59,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 20:29:59,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 20:29:59,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 20:29:59,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 20:29:59,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,524 INFO L137 Inliner]: procedures = 693, calls = 2626, calls flagged for inlining = 63, calls inlined = 11, statements flattened = 933 [2021-11-16 20:29:59,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 20:29:59,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 20:29:59,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 20:29:59,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 20:29:59,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 20:29:59,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 20:29:59,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 20:29:59,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 20:29:59,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (1/1) ... [2021-11-16 20:29:59,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 20:29:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:29:59,644 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) [2021-11-16 20:29:59,680 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 [2021-11-16 20:29:59,704 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-16 20:29:59,704 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-16 20:29:59,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 20:29:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-16 20:29:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-16 20:29:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-16 20:29:59,706 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-16 20:29:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 20:29:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 20:29:59,707 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 20:29:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 20:29:59,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 20:29:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 20:29:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 20:29:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 20:29:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-16 20:29:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-16 20:29:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 20:29:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 20:29:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 20:29:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 20:29:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-16 20:29:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-16 20:29:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-16 20:29:59,710 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-16 20:29:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-16 20:29:59,710 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-16 20:29:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 20:29:59,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-16 20:29:59,711 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-16 20:29:59,711 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 20:29:59,711 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-16 20:29:59,712 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-16 20:29:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 20:29:59,712 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 20:29:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 20:29:59,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 20:29:59,984 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 20:29:59,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 20:30:00,888 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 20:30:00,893 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 20:30:00,893 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-16 20:30:00,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:00 BoogieIcfgContainer [2021-11-16 20:30:00,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 20:30:00,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 20:30:00,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 20:30:00,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 20:30:00,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:29:57" (1/3) ... [2021-11-16 20:30:00,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e626bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:00, skipping insertion in model container [2021-11-16 20:30:00,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:59" (2/3) ... [2021-11-16 20:30:00,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e626bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:30:00, skipping insertion in model container [2021-11-16 20:30:00,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:30:00" (3/3) ... [2021-11-16 20:30:00,900 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_harness.i [2021-11-16 20:30:00,903 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 20:30:00,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 20:30:00,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 20:30:00,953 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 [2021-11-16 20:30:00,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 20:30:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-11-16 20:30:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-16 20:30:00,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:00,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-16 20:30:00,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash -283420546, now seen corresponding path program 1 times [2021-11-16 20:30:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:00,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959884240] [2021-11-16 20:30:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:30:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:30:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:30:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-16 20:30:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 20:30:01,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:01,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959884240] [2021-11-16 20:30:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959884240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:01,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:01,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 20:30:01,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480077972] [2021-11-16 20:30:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:01,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 20:30:01,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 20:30:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:30:01,557 INFO L87 Difference]: Start difference. First operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:30:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:02,081 INFO L93 Difference]: Finished difference Result 376 states and 532 transitions. [2021-11-16 20:30:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 20:30:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2021-11-16 20:30:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:02,090 INFO L225 Difference]: With dead ends: 376 [2021-11-16 20:30:02,090 INFO L226 Difference]: Without dead ends: 189 [2021-11-16 20:30:02,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 20:30:02,111 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:02,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 294 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-16 20:30:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-16 20:30:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-11-16 20:30:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-16 20:30:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2021-11-16 20:30:02,181 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 82 [2021-11-16 20:30:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:02,181 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2021-11-16 20:30:02,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 20:30:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2021-11-16 20:30:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-16 20:30:02,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:02,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:02,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 20:30:02,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 426190495, now seen corresponding path program 1 times [2021-11-16 20:30:02,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:02,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543618579] [2021-11-16 20:30:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:02,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:30:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:30:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:30:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:30:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:30:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 20:30:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-16 20:30:02,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:02,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543618579] [2021-11-16 20:30:02,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543618579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:02,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559978815] [2021-11-16 20:30:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:02,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:02,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:02,502 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) [2021-11-16 20:30:02,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 20:30:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:02,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 20:30:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 20:30:03,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:03,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559978815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:03,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:03,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-16 20:30:03,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621325900] [2021-11-16 20:30:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:03,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:30:03,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:30:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:03,115 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:03,153 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2021-11-16 20:30:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:30:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-11-16 20:30:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:03,155 INFO L225 Difference]: With dead ends: 248 [2021-11-16 20:30:03,155 INFO L226 Difference]: Without dead ends: 173 [2021-11-16 20:30:03,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:30:03,157 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:03,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1130 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-16 20:30:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-16 20:30:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-16 20:30:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2021-11-16 20:30:03,168 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 92 [2021-11-16 20:30:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:03,169 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 220 transitions. [2021-11-16 20:30:03,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 220 transitions. [2021-11-16 20:30:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-16 20:30:03,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:03,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:03,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-16 20:30:03,391 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 [2021-11-16 20:30:03,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1901749225, now seen corresponding path program 1 times [2021-11-16 20:30:03,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:03,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549255255] [2021-11-16 20:30:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:03,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:30:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:30:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:30:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:30:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:30:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 20:30:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-16 20:30:03,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:03,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549255255] [2021-11-16 20:30:03,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549255255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:03,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720924325] [2021-11-16 20:30:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:03,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:03,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:03,628 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) [2021-11-16 20:30:03,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 20:30:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2564 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-16 20:30:03,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-16 20:30:04,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:04,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720924325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:04,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:04,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-11-16 20:30:04,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509241437] [2021-11-16 20:30:04,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:04,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:04,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:04,200 INFO L87 Difference]: Start difference. First operand 173 states and 220 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 20:30:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:04,318 INFO L93 Difference]: Finished difference Result 249 states and 320 transitions. [2021-11-16 20:30:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 95 [2021-11-16 20:30:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:04,320 INFO L225 Difference]: With dead ends: 249 [2021-11-16 20:30:04,321 INFO L226 Difference]: Without dead ends: 176 [2021-11-16 20:30:04,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:30:04,322 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 78 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:04,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1119 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-16 20:30:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-11-16 20:30:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (49), 46 states have call predecessors, (49), 46 states have call successors, (49) [2021-11-16 20:30:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-11-16 20:30:04,333 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 95 [2021-11-16 20:30:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:04,333 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-11-16 20:30:04,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 20:30:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-11-16 20:30:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-16 20:30:04,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:04,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:04,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:04,568 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 [2021-11-16 20:30:04,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1019605314, now seen corresponding path program 1 times [2021-11-16 20:30:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:04,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440922929] [2021-11-16 20:30:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:04,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:30:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 20:30:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 20:30:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:30:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:30:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 20:30:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-16 20:30:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-16 20:30:04,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:04,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440922929] [2021-11-16 20:30:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440922929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:04,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442638457] [2021-11-16 20:30:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:04,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:04,842 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) [2021-11-16 20:30:04,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 20:30:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 20:30:05,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-16 20:30:05,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:05,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442638457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:05,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:05,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-16 20:30:05,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683220132] [2021-11-16 20:30:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:05,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:30:05,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:30:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:05,526 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:30:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:05,667 INFO L93 Difference]: Finished difference Result 338 states and 429 transitions. [2021-11-16 20:30:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 20:30:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 101 [2021-11-16 20:30:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:05,669 INFO L225 Difference]: With dead ends: 338 [2021-11-16 20:30:05,669 INFO L226 Difference]: Without dead ends: 176 [2021-11-16 20:30:05,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:30:05,670 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 249 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:05,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 481 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:30:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-16 20:30:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-11-16 20:30:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2021-11-16 20:30:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2021-11-16 20:30:05,679 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 101 [2021-11-16 20:30:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2021-11-16 20:30:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 20:30:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2021-11-16 20:30:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-16 20:30:05,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:05,681 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:05,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:05,897 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 [2021-11-16 20:30:05,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:05,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2090058387, now seen corresponding path program 2 times [2021-11-16 20:30:05,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:05,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301055281] [2021-11-16 20:30:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:05,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:05,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:30:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:30:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-16 20:30:06,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:06,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301055281] [2021-11-16 20:30:06,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301055281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:06,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774458903] [2021-11-16 20:30:06,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:30:06,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:06,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:06,124 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) [2021-11-16 20:30:06,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 20:30:06,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-16 20:30:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:30:06,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-16 20:30:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 20:30:06,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774458903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:06,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:06,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-16 20:30:06,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133228374] [2021-11-16 20:30:06,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:06,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:30:06,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:30:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-16 20:30:06,719 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:30:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:06,771 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2021-11-16 20:30:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:30:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 107 [2021-11-16 20:30:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:06,773 INFO L225 Difference]: With dead ends: 188 [2021-11-16 20:30:06,773 INFO L226 Difference]: Without dead ends: 186 [2021-11-16 20:30:06,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:06,774 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:06,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1493 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-16 20:30:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-16 20:30:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 121 states have internal predecessors, (135), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (54), 47 states have call predecessors, (54), 47 states have call successors, (54) [2021-11-16 20:30:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-11-16 20:30:06,797 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 107 [2021-11-16 20:30:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:06,798 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-11-16 20:30:06,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:30:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-11-16 20:30:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 20:30:06,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:06,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:06,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-16 20:30:07,014 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 [2021-11-16 20:30:07,015 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1813963275, now seen corresponding path program 1 times [2021-11-16 20:30:07,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:07,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451838489] [2021-11-16 20:30:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:07,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 20:30:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 20:30:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-16 20:30:07,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:07,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451838489] [2021-11-16 20:30:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451838489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:07,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576322546] [2021-11-16 20:30:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:07,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:07,254 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) [2021-11-16 20:30:07,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 20:30:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:30:07,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-16 20:30:07,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:07,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576322546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:07,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:07,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-16 20:30:07,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977330448] [2021-11-16 20:30:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:07,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:07,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:30:07,858 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:30:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:08,046 INFO L93 Difference]: Finished difference Result 342 states and 429 transitions. [2021-11-16 20:30:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:30:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 111 [2021-11-16 20:30:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:08,048 INFO L225 Difference]: With dead ends: 342 [2021-11-16 20:30:08,048 INFO L226 Difference]: Without dead ends: 182 [2021-11-16 20:30:08,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:30:08,049 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 275 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:08,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 775 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 20:30:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-16 20:30:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-16 20:30:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-11-16 20:30:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2021-11-16 20:30:08,057 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 111 [2021-11-16 20:30:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:08,057 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2021-11-16 20:30:08,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-16 20:30:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2021-11-16 20:30:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-16 20:30:08,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:08,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:08,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:08,279 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 [2021-11-16 20:30:08,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash 693216864, now seen corresponding path program 1 times [2021-11-16 20:30:08,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:08,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159625924] [2021-11-16 20:30:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:08,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:30:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 20:30:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-16 20:30:08,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:08,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159625924] [2021-11-16 20:30:08,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159625924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:08,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:30:08,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 20:30:08,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495737413] [2021-11-16 20:30:08,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:08,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 20:30:08,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 20:30:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:08,572 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:09,745 INFO L93 Difference]: Finished difference Result 286 states and 361 transitions. [2021-11-16 20:30:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:30:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-16 20:30:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:09,747 INFO L225 Difference]: With dead ends: 286 [2021-11-16 20:30:09,747 INFO L226 Difference]: Without dead ends: 200 [2021-11-16 20:30:09,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:30:09,748 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 166 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:09,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 522 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-16 20:30:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-16 20:30:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2021-11-16 20:30:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-11-16 20:30:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 234 transitions. [2021-11-16 20:30:09,756 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 234 transitions. Word has length 117 [2021-11-16 20:30:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 234 transitions. [2021-11-16 20:30:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 234 transitions. [2021-11-16 20:30:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-16 20:30:09,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:09,758 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:09,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 20:30:09,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1457718631, now seen corresponding path program 1 times [2021-11-16 20:30:09,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:09,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856732034] [2021-11-16 20:30:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:09,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:30:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:10,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:30:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-16 20:30:10,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:10,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856732034] [2021-11-16 20:30:10,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856732034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:10,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146790068] [2021-11-16 20:30:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:10,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:10,032 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) [2021-11-16 20:30:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 20:30:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 20:30:10,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-16 20:30:10,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:10,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146790068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:10,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:10,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-16 20:30:10,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156946163] [2021-11-16 20:30:10,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:10,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 20:30:10,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 20:30:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:30:10,716 INFO L87 Difference]: Start difference. First operand 183 states and 234 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:30:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:11,141 INFO L93 Difference]: Finished difference Result 370 states and 486 transitions. [2021-11-16 20:30:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2021-11-16 20:30:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:11,143 INFO L225 Difference]: With dead ends: 370 [2021-11-16 20:30:11,143 INFO L226 Difference]: Without dead ends: 201 [2021-11-16 20:30:11,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:30:11,144 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 40 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:11,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 782 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2021-11-16 20:30:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-16 20:30:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-11-16 20:30:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 124 states have internal predecessors, (140), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-11-16 20:30:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-16 20:30:11,151 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 118 [2021-11-16 20:30:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:11,152 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-16 20:30:11,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-16 20:30:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-16 20:30:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-16 20:30:11,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:11,153 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:11,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:11,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:11,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1199553193, now seen corresponding path program 1 times [2021-11-16 20:30:11,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:11,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123009528] [2021-11-16 20:30:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:11,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:30:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 20:30:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-16 20:30:11,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:11,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123009528] [2021-11-16 20:30:11,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123009528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:11,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101418729] [2021-11-16 20:30:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:11,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:11,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:11,616 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) [2021-11-16 20:30:11,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 20:30:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-16 20:30:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:12,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:30:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-16 20:30:12,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:13,123 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 40 treesize of output 34 [2021-11-16 20:30:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-16 20:30:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101418729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:30:13,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:30:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 11] total 26 [2021-11-16 20:30:13,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373669349] [2021-11-16 20:30:13,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:13,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-16 20:30:13,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-16 20:30:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-16 20:30:13,231 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-11-16 20:30:15,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:30:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:17,564 INFO L93 Difference]: Finished difference Result 471 states and 618 transitions. [2021-11-16 20:30:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 20:30:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 118 [2021-11-16 20:30:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:17,566 INFO L225 Difference]: With dead ends: 471 [2021-11-16 20:30:17,566 INFO L226 Difference]: Without dead ends: 309 [2021-11-16 20:30:17,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 232 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-11-16 20:30:17,567 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 253 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:17,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1592 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1830 Invalid, 0 Unknown, 330 Unchecked, 4.0s Time] [2021-11-16 20:30:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-16 20:30:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-11-16 20:30:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 157 states have internal predecessors, (178), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (59), 50 states have call predecessors, (59), 51 states have call successors, (59) [2021-11-16 20:30:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 289 transitions. [2021-11-16 20:30:17,578 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 289 transitions. Word has length 118 [2021-11-16 20:30:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:17,578 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 289 transitions. [2021-11-16 20:30:17,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-11-16 20:30:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 289 transitions. [2021-11-16 20:30:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-16 20:30:17,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:17,579 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:17,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:17,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1264569920, now seen corresponding path program 1 times [2021-11-16 20:30:17,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:17,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854879427] [2021-11-16 20:30:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:17,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 20:30:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 20:30:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-16 20:30:17,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:17,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854879427] [2021-11-16 20:30:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854879427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:17,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785605601] [2021-11-16 20:30:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:17,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:17,992 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) [2021-11-16 20:30:18,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 20:30:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-16 20:30:18,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:18,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785605601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:18,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:18,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:18,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578688058] [2021-11-16 20:30:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:18,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:18,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:18,541 INFO L87 Difference]: Start difference. First operand 228 states and 289 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:18,565 INFO L93 Difference]: Finished difference Result 451 states and 576 transitions. [2021-11-16 20:30:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-16 20:30:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:18,566 INFO L225 Difference]: With dead ends: 451 [2021-11-16 20:30:18,567 INFO L226 Difference]: Without dead ends: 237 [2021-11-16 20:30:18,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:18,568 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 20 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:18,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 649 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-16 20:30:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-11-16 20:30:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 153 states have internal predecessors, (173), 52 states have call successors, (52), 20 states have call predecessors, (52), 21 states have return successors, (57), 50 states have call predecessors, (57), 51 states have call successors, (57) [2021-11-16 20:30:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-11-16 20:30:18,592 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 119 [2021-11-16 20:30:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:18,593 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-11-16 20:30:18,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-11-16 20:30:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-16 20:30:18,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:18,594 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:18,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:18,810 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,SelfDestructingSolverStorable9 [2021-11-16 20:30:18,810 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1982077188, now seen corresponding path program 2 times [2021-11-16 20:30:18,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:18,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569116370] [2021-11-16 20:30:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:18,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:18,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 20:30:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:19,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 20:30:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-16 20:30:19,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:19,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569116370] [2021-11-16 20:30:19,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569116370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:19,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75986116] [2021-11-16 20:30:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:30:19,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:19,078 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) [2021-11-16 20:30:19,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 20:30:19,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:30:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:30:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 20:30:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-16 20:30:20,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75986116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:20,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:20,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-16 20:30:20,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715889442] [2021-11-16 20:30:20,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:20,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 20:30:20,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 20:30:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-16 20:30:20,125 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:20,165 INFO L93 Difference]: Finished difference Result 394 states and 495 transitions. [2021-11-16 20:30:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 20:30:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-11-16 20:30:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:20,167 INFO L225 Difference]: With dead ends: 394 [2021-11-16 20:30:20,167 INFO L226 Difference]: Without dead ends: 229 [2021-11-16 20:30:20,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-16 20:30:20,168 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:20,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1323 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-16 20:30:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-11-16 20:30:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 158 states have internal predecessors, (177), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (62), 50 states have call predecessors, (62), 51 states have call successors, (62) [2021-11-16 20:30:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 291 transitions. [2021-11-16 20:30:20,177 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 291 transitions. Word has length 123 [2021-11-16 20:30:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 291 transitions. [2021-11-16 20:30:20,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 291 transitions. [2021-11-16 20:30:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-16 20:30:20,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:20,178 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:20,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:20,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:20,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1351230667, now seen corresponding path program 1 times [2021-11-16 20:30:20,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:20,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528029374] [2021-11-16 20:30:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:20,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 20:30:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 20:30:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 20:30:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 20:30:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:30:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-16 20:30:20,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:20,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528029374] [2021-11-16 20:30:20,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528029374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:20,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808427079] [2021-11-16 20:30:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:20,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:20,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:20,711 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) [2021-11-16 20:30:20,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 20:30:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-16 20:30:21,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:21,486 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 [2021-11-16 20:30:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:30:21,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:21,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808427079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:21,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2021-11-16 20:30:21,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062588957] [2021-11-16 20:30:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:21,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:30:21,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:30:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-16 20:30:21,587 INFO L87 Difference]: Start difference. First operand 229 states and 291 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:30:23,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:30:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:25,134 INFO L93 Difference]: Finished difference Result 524 states and 702 transitions. [2021-11-16 20:30:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:30:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 126 [2021-11-16 20:30:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:25,136 INFO L225 Difference]: With dead ends: 524 [2021-11-16 20:30:25,136 INFO L226 Difference]: Without dead ends: 347 [2021-11-16 20:30:25,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:30:25,137 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 192 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:25,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1872 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 419 Invalid, 0 Unknown, 95 Unchecked, 3.4s Time] [2021-11-16 20:30:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-16 20:30:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 267. [2021-11-16 20:30:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 182 states have (on average 1.1373626373626373) internal successors, (207), 188 states have internal predecessors, (207), 56 states have call successors, (56), 23 states have call predecessors, (56), 28 states have return successors, (79), 55 states have call predecessors, (79), 55 states have call successors, (79) [2021-11-16 20:30:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2021-11-16 20:30:25,157 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 126 [2021-11-16 20:30:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:25,157 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2021-11-16 20:30:25,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:30:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2021-11-16 20:30:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-16 20:30:25,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:25,158 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:25,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:25,380 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,SelfDestructingSolverStorable11 [2021-11-16 20:30:25,380 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1989755287, now seen corresponding path program 1 times [2021-11-16 20:30:25,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:25,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5248063] [2021-11-16 20:30:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:25,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:30:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:30:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-16 20:30:25,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:25,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5248063] [2021-11-16 20:30:25,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5248063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:25,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069155051] [2021-11-16 20:30:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:25,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:25,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:25,557 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) [2021-11-16 20:30:25,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 20:30:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:25,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 20:30:26,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:26,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069155051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:26,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:26,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:26,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495340700] [2021-11-16 20:30:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:26,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:26,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:26,105 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:26,130 INFO L93 Difference]: Finished difference Result 518 states and 665 transitions. [2021-11-16 20:30:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-16 20:30:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:26,132 INFO L225 Difference]: With dead ends: 518 [2021-11-16 20:30:26,132 INFO L226 Difference]: Without dead ends: 265 [2021-11-16 20:30:26,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:26,134 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 9 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:26,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 645 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-16 20:30:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-11-16 20:30:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 183 states have internal predecessors, (201), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 55 states have call predecessors, (72), 55 states have call successors, (72) [2021-11-16 20:30:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 329 transitions. [2021-11-16 20:30:26,147 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 329 transitions. Word has length 125 [2021-11-16 20:30:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:26,147 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 329 transitions. [2021-11-16 20:30:26,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 329 transitions. [2021-11-16 20:30:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-16 20:30:26,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:26,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:26,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-16 20:30:26,369 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,SelfDestructingSolverStorable12 [2021-11-16 20:30:26,369 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 44113837, now seen corresponding path program 1 times [2021-11-16 20:30:26,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:26,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756770782] [2021-11-16 20:30:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:26,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:30:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:30:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-16 20:30:26,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:26,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756770782] [2021-11-16 20:30:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756770782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:26,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439454982] [2021-11-16 20:30:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:26,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:26,580 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) [2021-11-16 20:30:26,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 20:30:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 20:30:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-16 20:30:27,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:30:27,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439454982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:30:27,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:30:27,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-11-16 20:30:27,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948803032] [2021-11-16 20:30:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:30:27,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 20:30:27,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 20:30:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 20:30:27,155 INFO L87 Difference]: Start difference. First operand 262 states and 329 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:27,180 INFO L93 Difference]: Finished difference Result 488 states and 627 transitions. [2021-11-16 20:30:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 20:30:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-16 20:30:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:27,182 INFO L225 Difference]: With dead ends: 488 [2021-11-16 20:30:27,182 INFO L226 Difference]: Without dead ends: 259 [2021-11-16 20:30:27,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 20:30:27,184 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 26 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:27,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 657 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 20:30:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-16 20:30:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-11-16 20:30:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 173 states have internal predecessors, (188), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (71), 55 states have call predecessors, (71), 55 states have call successors, (71) [2021-11-16 20:30:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 315 transitions. [2021-11-16 20:30:27,193 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 315 transitions. Word has length 125 [2021-11-16 20:30:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:27,193 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 315 transitions. [2021-11-16 20:30:27,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 20:30:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 315 transitions. [2021-11-16 20:30:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-16 20:30:27,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:27,195 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:27,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:27,410 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,SelfDestructingSolverStorable13 [2021-11-16 20:30:27,410 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash -308974545, now seen corresponding path program 1 times [2021-11-16 20:30:27,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:27,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435135443] [2021-11-16 20:30:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:27,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:30:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:30:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:30:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:30:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:30:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:30:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:30:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 20:30:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-16 20:30:27,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:27,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435135443] [2021-11-16 20:30:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435135443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593836851] [2021-11-16 20:30:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:27,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:27,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:27,676 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) [2021-11-16 20:30:27,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 20:30:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-16 20:30:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:30:28,640 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 16 treesize of output 8 [2021-11-16 20:30:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-16 20:30:28,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:28,874 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 40 treesize of output 34 [2021-11-16 20:30:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-16 20:30:28,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593836851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:30:28,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:30:28,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2021-11-16 20:30:28,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236966815] [2021-11-16 20:30:28,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:28,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 20:30:28,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 20:30:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-16 20:30:28,972 INFO L87 Difference]: Start difference. First operand 252 states and 315 transitions. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-11-16 20:30:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:30,682 INFO L93 Difference]: Finished difference Result 461 states and 586 transitions. [2021-11-16 20:30:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 20:30:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 125 [2021-11-16 20:30:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:30,684 INFO L225 Difference]: With dead ends: 461 [2021-11-16 20:30:30,684 INFO L226 Difference]: Without dead ends: 346 [2021-11-16 20:30:30,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-11-16 20:30:30,685 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 219 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:30,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1811 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1582 Invalid, 0 Unknown, 314 Unchecked, 1.5s Time] [2021-11-16 20:30:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-16 20:30:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 277. [2021-11-16 20:30:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 197 states have internal predecessors, (215), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (68), 56 states have call predecessors, (68), 55 states have call successors, (68) [2021-11-16 20:30:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2021-11-16 20:30:30,694 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 339 transitions. Word has length 125 [2021-11-16 20:30:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 339 transitions. [2021-11-16 20:30:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-11-16 20:30:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 339 transitions. [2021-11-16 20:30:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 20:30:30,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:30,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:30,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:30,896 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,SelfDestructingSolverStorable14 [2021-11-16 20:30:30,896 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -564182680, now seen corresponding path program 1 times [2021-11-16 20:30:30,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:30,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272869063] [2021-11-16 20:30:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:30,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:30:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:30:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:30:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:30:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:30:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:30:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:30:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 20:30:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 20:30:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-16 20:30:31,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:31,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272869063] [2021-11-16 20:30:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272869063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681912055] [2021-11-16 20:30:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:31,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:31,144 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) [2021-11-16 20:30:31,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 20:30:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-16 20:30:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:31,510 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 6 treesize of output 5 [2021-11-16 20:30:31,698 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-16 20:30:31,698 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 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-16 20:30:31,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-16 20:30:32,086 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 20:30:32,086 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 23 treesize of output 15 [2021-11-16 20:30:36,315 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-16 20:30:36,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 31 [2021-11-16 20:30:36,524 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-16 20:30:36,524 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 6 case distinctions, treesize of input 32 treesize of output 32 [2021-11-16 20:30:36,564 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 36 treesize of output 18 [2021-11-16 20:30:38,658 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-16 20:30:38,658 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 44 treesize of output 22 [2021-11-16 20:30:44,909 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 16 treesize of output 8 [2021-11-16 20:30:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-16 20:30:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:30:45,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681912055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:45,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:30:45,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2021-11-16 20:30:45,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78671682] [2021-11-16 20:30:45,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:30:45,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-16 20:30:45,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:30:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-16 20:30:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=713, Unknown=2, NotChecked=0, Total=812 [2021-11-16 20:30:45,906 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 23 states have internal predecessors, (136), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:30:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:30:52,397 INFO L93 Difference]: Finished difference Result 527 states and 624 transitions. [2021-11-16 20:30:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-16 20:30:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 23 states have internal predecessors, (136), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 131 [2021-11-16 20:30:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:30:52,399 INFO L225 Difference]: With dead ends: 527 [2021-11-16 20:30:52,399 INFO L226 Difference]: Without dead ends: 365 [2021-11-16 20:30:52,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 191 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=206, Invalid=1683, Unknown=3, NotChecked=0, Total=1892 [2021-11-16 20:30:52,400 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 348 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:30:52,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1810 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1233 Invalid, 0 Unknown, 902 Unchecked, 1.6s Time] [2021-11-16 20:30:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-16 20:30:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 328. [2021-11-16 20:30:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 236 states have (on average 1.1016949152542372) internal successors, (260), 240 states have internal predecessors, (260), 58 states have call successors, (58), 30 states have call predecessors, (58), 33 states have return successors, (69), 57 states have call predecessors, (69), 57 states have call successors, (69) [2021-11-16 20:30:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 387 transitions. [2021-11-16 20:30:52,411 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 387 transitions. Word has length 131 [2021-11-16 20:30:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:30:52,412 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 387 transitions. [2021-11-16 20:30:52,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 23 states have internal predecessors, (136), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:30:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 387 transitions. [2021-11-16 20:30:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-16 20:30:52,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:30:52,413 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:30:52,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 20:30:52,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:52,645 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:30:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:30:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1422756542, now seen corresponding path program 1 times [2021-11-16 20:30:52,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:30:52,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569985620] [2021-11-16 20:30:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:52,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:30:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:30:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:30:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:30:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:30:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:30:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:30:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:30:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:30:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:30:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:30:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:30:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:30:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:30:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 20:30:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-16 20:30:52,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:30:52,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569985620] [2021-11-16 20:30:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569985620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:30:52,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370125776] [2021-11-16 20:30:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:30:52,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:30:52,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:30:52,984 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) [2021-11-16 20:30:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 20:30:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:30:53,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-16 20:30:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:30:53,351 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 6 treesize of output 5 [2021-11-16 20:30:53,557 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:30:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:30:53,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-16 20:30:53,946 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-16 20:30:53,947 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 31 treesize of output 23 [2021-11-16 20:30:59,625 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-16 20:30:59,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 26 treesize of output 31 [2021-11-16 20:30:59,852 INFO L354 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2021-11-16 20:30:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 32 [2021-11-16 20:30:59,896 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 46 treesize of output 22 [2021-11-16 20:31:06,676 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-16 20:31:06,676 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 54 treesize of output 26 [2021-11-16 20:31:21,857 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 24 treesize of output 12 [2021-11-16 20:31:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 57 proven. 53 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-16 20:31:21,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:31:23,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370125776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:23,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:31:23,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 27 [2021-11-16 20:31:23,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580448543] [2021-11-16 20:31:23,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:31:23,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:31:23,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:31:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:31:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=768, Unknown=2, NotChecked=0, Total=870 [2021-11-16 20:31:23,058 INFO L87 Difference]: Start difference. First operand 328 states and 387 transitions. Second operand has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 24 states have internal predecessors, (147), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:31:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:31:35,743 INFO L93 Difference]: Finished difference Result 553 states and 650 transitions. [2021-11-16 20:31:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 20:31:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 24 states have internal predecessors, (147), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 138 [2021-11-16 20:31:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:31:35,746 INFO L225 Difference]: With dead ends: 553 [2021-11-16 20:31:35,746 INFO L226 Difference]: Without dead ends: 439 [2021-11-16 20:31:35,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 206 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=216, Invalid=1850, Unknown=4, NotChecked=0, Total=2070 [2021-11-16 20:31:35,747 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 302 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1281 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 20:31:35,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1762 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1525 Invalid, 0 Unknown, 1281 Unchecked, 2.0s Time] [2021-11-16 20:31:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-16 20:31:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 392. [2021-11-16 20:31:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 282 states have (on average 1.0957446808510638) internal successors, (309), 288 states have internal predecessors, (309), 68 states have call successors, (68), 37 states have call predecessors, (68), 41 states have return successors, (82), 66 states have call predecessors, (82), 67 states have call successors, (82) [2021-11-16 20:31:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 459 transitions. [2021-11-16 20:31:35,759 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 459 transitions. Word has length 138 [2021-11-16 20:31:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:31:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 459 transitions. [2021-11-16 20:31:35,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 24 states have internal predecessors, (147), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:31:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 459 transitions. [2021-11-16 20:31:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-16 20:31:35,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:31:35,761 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:31:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 20:31:35,981 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,SelfDestructingSolverStorable16 [2021-11-16 20:31:35,982 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:31:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:31:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1899732229, now seen corresponding path program 2 times [2021-11-16 20:31:35,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:31:35,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182796460] [2021-11-16 20:31:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:31:35,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:31:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:31:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:31:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:31:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:31:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:31:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:31:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:31:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:31:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:31:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:31:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:31:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:31:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:31:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-16 20:31:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:31:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-16 20:31:36,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:31:36,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182796460] [2021-11-16 20:31:36,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182796460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:31:36,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152629716] [2021-11-16 20:31:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 20:31:36,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:31:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:31:36,389 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) [2021-11-16 20:31:36,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 20:31:36,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 20:31:36,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:31:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2691 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-16 20:31:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:31:36,889 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 6 treesize of output 5 [2021-11-16 20:31:37,062 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-16 20:31:37,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-16 20:31:38,061 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-16 20:31:38,061 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 45 treesize of output 39 [2021-11-16 20:31:38,460 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-16 20:31:38,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-16 20:31:39,013 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-16 20:31:39,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 35 treesize of output 37 [2021-11-16 20:31:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:39,062 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 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-16 20:31:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:39,364 INFO L354 Elim1Store]: treesize reduction 366, result has 20.6 percent of original size [2021-11-16 20:31:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 106 treesize of output 164 [2021-11-16 20:31:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 33 [2021-11-16 20:31:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,120 INFO L354 Elim1Store]: treesize reduction 99, result has 12.4 percent of original size [2021-11-16 20:31:40,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 79 treesize of output 57 [2021-11-16 20:31:40,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 34 [2021-11-16 20:31:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:41,202 INFO L354 Elim1Store]: treesize reduction 119, result has 10.5 percent of original size [2021-11-16 20:31:41,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 90 [2021-11-16 20:31:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:41,345 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-16 20:31:41,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 54 [2021-11-16 20:31:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 20:31:41,363 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-16 20:31:41,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 66 [2021-11-16 20:33:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 73 proven. 53 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-16 20:33:15,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:33:21,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152629716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:33:21,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:33:21,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 37 [2021-11-16 20:33:21,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615381673] [2021-11-16 20:33:21,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:33:21,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-16 20:33:21,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:33:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-16 20:33:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1633, Unknown=12, NotChecked=0, Total=1806 [2021-11-16 20:33:21,633 INFO L87 Difference]: Start difference. First operand 392 states and 459 transitions. Second operand has 37 states, 36 states have (on average 4.194444444444445) internal successors, (151), 34 states have internal predecessors, (151), 10 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:33:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:33:59,833 INFO L93 Difference]: Finished difference Result 666 states and 788 transitions. [2021-11-16 20:33:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-16 20:33:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.194444444444445) internal successors, (151), 34 states have internal predecessors, (151), 10 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 139 [2021-11-16 20:33:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:33:59,837 INFO L225 Difference]: With dead ends: 666 [2021-11-16 20:33:59,837 INFO L226 Difference]: Without dead ends: 480 [2021-11-16 20:33:59,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 199 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 101.3s TimeCoverageRelationStatistics Valid=394, Invalid=4133, Unknown=29, NotChecked=0, Total=4556 [2021-11-16 20:33:59,839 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 233 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-16 20:33:59,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1452 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 605 Invalid, 0 Unknown, 930 Unchecked, 1.3s Time] [2021-11-16 20:33:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-16 20:33:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 462. [2021-11-16 20:33:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 335 states have (on average 1.0955223880597016) internal successors, (367), 341 states have internal predecessors, (367), 78 states have call successors, (78), 45 states have call predecessors, (78), 48 states have return successors, (97), 75 states have call predecessors, (97), 77 states have call successors, (97) [2021-11-16 20:33:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 542 transitions. [2021-11-16 20:33:59,859 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 542 transitions. Word has length 139 [2021-11-16 20:33:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:33:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 542 transitions. [2021-11-16 20:33:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.194444444444445) internal successors, (151), 34 states have internal predecessors, (151), 10 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-16 20:33:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 542 transitions. [2021-11-16 20:33:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-16 20:33:59,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:33:59,863 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:33:59,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:00,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 20:34:00,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1503695900, now seen corresponding path program 1 times [2021-11-16 20:34:00,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:00,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341952501] [2021-11-16 20:34:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:00,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-16 20:34:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 20:34:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 20:34:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-16 20:34:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:34:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:34:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 20:34:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 20:34:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 20:34:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-16 20:34:00,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:00,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341952501] [2021-11-16 20:34:00,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341952501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:00,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240095547] [2021-11-16 20:34:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:00,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:00,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:00,552 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) [2021-11-16 20:34:00,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 20:34:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-16 20:34:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-16 20:34:01,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:34:01,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240095547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:01,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:34:01,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-16 20:34:01,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551403302] [2021-11-16 20:34:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:34:01,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:34:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:34:01,270 INFO L87 Difference]: Start difference. First operand 462 states and 542 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-16 20:34:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:01,449 INFO L93 Difference]: Finished difference Result 792 states and 933 transitions. [2021-11-16 20:34:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 20:34:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 140 [2021-11-16 20:34:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:01,452 INFO L225 Difference]: With dead ends: 792 [2021-11-16 20:34:01,452 INFO L226 Difference]: Without dead ends: 394 [2021-11-16 20:34:01,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:34:01,453 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 12 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:01,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1639 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 20:34:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-16 20:34:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 379. [2021-11-16 20:34:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 270 states have (on average 1.0851851851851853) internal successors, (293), 275 states have internal predecessors, (293), 68 states have call successors, (68), 37 states have call predecessors, (68), 40 states have return successors, (81), 66 states have call predecessors, (81), 67 states have call successors, (81) [2021-11-16 20:34:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 442 transitions. [2021-11-16 20:34:01,467 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 442 transitions. Word has length 140 [2021-11-16 20:34:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:01,467 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 442 transitions. [2021-11-16 20:34:01,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-16 20:34:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 442 transitions. [2021-11-16 20:34:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-16 20:34:01,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:01,468 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:01,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:01,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:01,688 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2146662187, now seen corresponding path program 3 times [2021-11-16 20:34:01,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:01,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763975329] [2021-11-16 20:34:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:01,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:34:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:34:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:34:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:34:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:34:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:34:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:01,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 20:34:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 20:34:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-16 20:34:02,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:02,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763975329] [2021-11-16 20:34:02,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763975329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:02,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136870536] [2021-11-16 20:34:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 20:34:02,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:02,096 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) [2021-11-16 20:34:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 20:34:04,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-16 20:34:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:34:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 20:34:04,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-16 20:34:04,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:34:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-16 20:34:05,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136870536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 20:34:05,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 20:34:05,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2021-11-16 20:34:05,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121657508] [2021-11-16 20:34:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 20:34:05,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 20:34:05,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 20:34:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:34:05,417 INFO L87 Difference]: Start difference. First operand 379 states and 442 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 2 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-16 20:34:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:12,761 INFO L93 Difference]: Finished difference Result 506 states and 602 transitions. [2021-11-16 20:34:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 20:34:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 2 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 142 [2021-11-16 20:34:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:12,763 INFO L225 Difference]: With dead ends: 506 [2021-11-16 20:34:12,764 INFO L226 Difference]: Without dead ends: 404 [2021-11-16 20:34:12,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=451, Invalid=1529, Unknown=0, NotChecked=0, Total=1980 [2021-11-16 20:34:12,765 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 215 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1142 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-16 20:34:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-16 20:34:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 387. [2021-11-16 20:34:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 278 states have (on average 1.0827338129496402) internal successors, (301), 283 states have internal predecessors, (301), 68 states have call successors, (68), 37 states have call predecessors, (68), 40 states have return successors, (81), 66 states have call predecessors, (81), 67 states have call successors, (81) [2021-11-16 20:34:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 450 transitions. [2021-11-16 20:34:12,813 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 450 transitions. Word has length 142 [2021-11-16 20:34:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:12,813 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 450 transitions. [2021-11-16 20:34:12,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 25 states have internal predecessors, (97), 2 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-16 20:34:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 450 transitions. [2021-11-16 20:34:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-16 20:34:12,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:12,818 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:12,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:13,026 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1111707221, now seen corresponding path program 4 times [2021-11-16 20:34:13,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:13,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395900984] [2021-11-16 20:34:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:13,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:34:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:34:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:34:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:34:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:34:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:34:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 20:34:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-16 20:34:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-16 20:34:13,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:13,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395900984] [2021-11-16 20:34:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395900984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:13,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954064539] [2021-11-16 20:34:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 20:34:13,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:13,662 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) [2021-11-16 20:34:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 20:34:14,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 20:34:14,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 20:34:14,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 20:34:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:14,823 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 [2021-11-16 20:34:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-16 20:34:14,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:34:14,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954064539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:14,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:34:14,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 27 [2021-11-16 20:34:14,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344889995] [2021-11-16 20:34:14,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:14,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:34:14,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:34:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-16 20:34:14,985 INFO L87 Difference]: Start difference. First operand 387 states and 450 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:34:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:15,843 INFO L93 Difference]: Finished difference Result 600 states and 724 transitions. [2021-11-16 20:34:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:34:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 150 [2021-11-16 20:34:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:15,846 INFO L225 Difference]: With dead ends: 600 [2021-11-16 20:34:15,846 INFO L226 Difference]: Without dead ends: 387 [2021-11-16 20:34:15,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 166 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-11-16 20:34:15,847 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 86 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:15,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1542 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 257 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2021-11-16 20:34:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-16 20:34:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 297. [2021-11-16 20:34:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 212 states have (on average 1.0896226415094339) internal successors, (231), 215 states have internal predecessors, (231), 54 states have call successors, (54), 29 states have call predecessors, (54), 30 states have return successors, (59), 52 states have call predecessors, (59), 53 states have call successors, (59) [2021-11-16 20:34:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 344 transitions. [2021-11-16 20:34:15,857 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 344 transitions. Word has length 150 [2021-11-16 20:34:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:15,858 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 344 transitions. [2021-11-16 20:34:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 20:34:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 344 transitions. [2021-11-16 20:34:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-16 20:34:15,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:15,859 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:15,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:16,079 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash -901499543, now seen corresponding path program 1 times [2021-11-16 20:34:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:16,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926820175] [2021-11-16 20:34:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:16,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:34:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:34:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:34:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:34:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:34:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:34:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:34:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:34:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 20:34:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:34:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 20:34:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-16 20:34:16,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:16,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926820175] [2021-11-16 20:34:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926820175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:16,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:34:16,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 20:34:16,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303379931] [2021-11-16 20:34:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:16,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 20:34:16,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 20:34:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-16 20:34:16,388 INFO L87 Difference]: Start difference. First operand 297 states and 344 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-16 20:34:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:18,111 INFO L93 Difference]: Finished difference Result 426 states and 500 transitions. [2021-11-16 20:34:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:34:18,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 178 [2021-11-16 20:34:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:18,115 INFO L225 Difference]: With dead ends: 426 [2021-11-16 20:34:18,115 INFO L226 Difference]: Without dead ends: 317 [2021-11-16 20:34:18,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:34:18,115 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 223 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 706 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-16 20:34:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-16 20:34:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 302. [2021-11-16 20:34:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 216 states have (on average 1.087962962962963) internal successors, (235), 219 states have internal predecessors, (235), 54 states have call successors, (54), 29 states have call predecessors, (54), 31 states have return successors, (60), 53 states have call predecessors, (60), 53 states have call successors, (60) [2021-11-16 20:34:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 349 transitions. [2021-11-16 20:34:18,130 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 349 transitions. Word has length 178 [2021-11-16 20:34:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 349 transitions. [2021-11-16 20:34:18,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-16 20:34:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 349 transitions. [2021-11-16 20:34:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-16 20:34:18,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:18,132 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:18,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-16 20:34:18,132 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 475071338, now seen corresponding path program 1 times [2021-11-16 20:34:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:18,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633757517] [2021-11-16 20:34:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:18,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:34:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:34:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:34:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:34:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:34:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:34:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:34:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:34:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 20:34:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 20:34:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:34:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-16 20:34:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-16 20:34:18,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:18,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633757517] [2021-11-16 20:34:18,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633757517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:18,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:34:18,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 20:34:18,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957309034] [2021-11-16 20:34:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:18,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 20:34:18,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:18,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 20:34:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 20:34:18,432 INFO L87 Difference]: Start difference. First operand 302 states and 349 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-16 20:34:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:19,568 INFO L93 Difference]: Finished difference Result 423 states and 496 transitions. [2021-11-16 20:34:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 20:34:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 184 [2021-11-16 20:34:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:19,569 INFO L225 Difference]: With dead ends: 423 [2021-11-16 20:34:19,569 INFO L226 Difference]: Without dead ends: 298 [2021-11-16 20:34:19,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-16 20:34:19,570 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 237 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:19,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 749 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-16 20:34:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-16 20:34:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-16 20:34:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 208 states have (on average 1.0817307692307692) internal successors, (225), 211 states have internal predecessors, (225), 53 states have call successors, (53), 28 states have call predecessors, (53), 29 states have return successors, (58), 51 states have call predecessors, (58), 52 states have call successors, (58) [2021-11-16 20:34:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 336 transitions. [2021-11-16 20:34:19,579 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 336 transitions. Word has length 184 [2021-11-16 20:34:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:19,580 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 336 transitions. [2021-11-16 20:34:19,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (26), 6 states have call predecessors, (26), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-16 20:34:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 336 transitions. [2021-11-16 20:34:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-16 20:34:19,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:19,581 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:19,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-16 20:34:19,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1874827005, now seen corresponding path program 1 times [2021-11-16 20:34:19,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:19,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317625686] [2021-11-16 20:34:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:19,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:34:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:34:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:34:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:34:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:34:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:34:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:34:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:34:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 20:34:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:34:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-16 20:34:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-16 20:34:19,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:19,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317625686] [2021-11-16 20:34:19,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317625686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:19,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:34:19,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 20:34:19,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423421601] [2021-11-16 20:34:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 20:34:19,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 20:34:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 20:34:19,898 INFO L87 Difference]: Start difference. First operand 291 states and 336 transitions. Second operand has 11 states, 10 states have (on average 7.8) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-16 20:34:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:21,760 INFO L93 Difference]: Finished difference Result 318 states and 366 transitions. [2021-11-16 20:34:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 20:34:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 189 [2021-11-16 20:34:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:21,762 INFO L225 Difference]: With dead ends: 318 [2021-11-16 20:34:21,762 INFO L226 Difference]: Without dead ends: 316 [2021-11-16 20:34:21,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-16 20:34:21,763 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 159 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:21,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 965 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-16 20:34:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-16 20:34:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 300. [2021-11-16 20:34:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 214 states have (on average 1.0794392523364487) internal successors, (231), 218 states have internal predecessors, (231), 54 states have call successors, (54), 29 states have call predecessors, (54), 31 states have return successors, (62), 52 states have call predecessors, (62), 53 states have call successors, (62) [2021-11-16 20:34:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 347 transitions. [2021-11-16 20:34:21,772 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 347 transitions. Word has length 189 [2021-11-16 20:34:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:21,772 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 347 transitions. [2021-11-16 20:34:21,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-16 20:34:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 347 transitions. [2021-11-16 20:34:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-16 20:34:21,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:21,774 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:21,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-16 20:34:21,774 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1285146295, now seen corresponding path program 1 times [2021-11-16 20:34:21,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:21,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065305907] [2021-11-16 20:34:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:21,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 20:34:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 20:34:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 20:34:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 20:34:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 20:34:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 20:34:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:34:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:34:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:34:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 20:34:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:34:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-16 20:34:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-16 20:34:22,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065305907] [2021-11-16 20:34:22,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065305907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:22,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54494418] [2021-11-16 20:34:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:22,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:22,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:22,423 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) [2021-11-16 20:34:22,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 20:34:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:22,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2876 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-16 20:34:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:34:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-16 20:34:23,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 20:34:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54494418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:34:23,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 20:34:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 22 [2021-11-16 20:34:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135098114] [2021-11-16 20:34:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:34:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 20:34:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:34:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 20:34:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-16 20:34:23,409 INFO L87 Difference]: Start difference. First operand 300 states and 347 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-16 20:34:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:34:23,523 INFO L93 Difference]: Finished difference Result 504 states and 584 transitions. [2021-11-16 20:34:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 20:34:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 193 [2021-11-16 20:34:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:34:23,525 INFO L225 Difference]: With dead ends: 504 [2021-11-16 20:34:23,525 INFO L226 Difference]: Without dead ends: 296 [2021-11-16 20:34:23,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-16 20:34:23,526 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 93 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:34:23,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 852 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 61 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-16 20:34:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-16 20:34:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-11-16 20:34:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 210 states have (on average 1.0761904761904761) internal successors, (226), 214 states have internal predecessors, (226), 54 states have call successors, (54), 29 states have call predecessors, (54), 31 states have return successors, (62), 52 states have call predecessors, (62), 53 states have call successors, (62) [2021-11-16 20:34:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 342 transitions. [2021-11-16 20:34:23,536 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 342 transitions. Word has length 193 [2021-11-16 20:34:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:34:23,536 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 342 transitions. [2021-11-16 20:34:23,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-16 20:34:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 342 transitions. [2021-11-16 20:34:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-16 20:34:23,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:34:23,538 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:34:23,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 20:34:23,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-16 20:34:23,770 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:34:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:34:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2143918970, now seen corresponding path program 1 times [2021-11-16 20:34:23,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:34:23,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756067085] [2021-11-16 20:34:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:23,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:34:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:34:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:34:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:34:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:34:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:34:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:34:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:34:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:34:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:34:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:34:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:34:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:34:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:34:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:34:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-16 20:34:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:34:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:34:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:34:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-16 20:34:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-16 20:34:25,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:34:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756067085] [2021-11-16 20:34:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756067085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:34:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830344662] [2021-11-16 20:34:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:34:25,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:34:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:34:25,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:34:25,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 20:34:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:34:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 20:34:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:34:26,022 INFO L354 Elim1Store]: treesize reduction 182, result has 11.7 percent of original size [2021-11-16 20:34:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 81 [2021-11-16 20:34:26,116 INFO L354 Elim1Store]: treesize reduction 272, result has 10.8 percent of original size [2021-11-16 20:34:26,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 75 treesize of output 69 [2021-11-16 20:34:26,156 INFO L354 Elim1Store]: treesize reduction 208, result has 13.7 percent of original size [2021-11-16 20:34:26,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 53 [2021-11-16 20:34:28,315 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_9| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base| Int)) (let ((.cse1 (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|)) (.cse0 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_9|))) (and (= (select .cse0 (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_3| 16)) (select .cse1 (+ 16 |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|))) (< (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_9| 1) |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) (= (select .cse1 |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|) (select .cse0 |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_3|))))) is different from true [2021-11-16 20:34:47,987 INFO L354 Elim1Store]: treesize reduction 208, result has 13.7 percent of original size [2021-11-16 20:34:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 20:34:50,187 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_5| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_11| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base| Int)) (let ((.cse2 (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|))) (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_11|)) (.cse0 (select .cse2 (+ 16 |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|)))) (and (not (= (mod .cse0 18446744073709551616) 0)) (= (select .cse1 |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_5|) (select .cse2 |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.offset|)) (< (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.base_BEFORE_CALL_11| 1) |ULTIMATE.start_aws_byte_buf_init_copy_~src#1.base|) (= (select .cse1 (+ |v_ULTIMATE.start_aws_byte_buf_init_copy_~dest#1.offset_BEFORE_CALL_5| 16)) .cse0))))) is different from true [2021-11-16 20:35:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 118 proven. 9 refuted. 27 times theorem prover too weak. 170 trivial. 8 not checked. [2021-11-16 20:35:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:35:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830344662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:35:06,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:35:06,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 49 [2021-11-16 20:35:06,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400494123] [2021-11-16 20:35:06,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:35:06,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-16 20:35:06,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:35:06,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-16 20:35:06,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3106, Unknown=8, NotChecked=226, Total=3540 [2021-11-16 20:35:06,101 INFO L87 Difference]: Start difference. First operand 296 states and 342 transitions. Second operand has 49 states, 45 states have (on average 3.533333333333333) internal successors, (159), 41 states have internal predecessors, (159), 21 states have call successors, (49), 8 states have call predecessors, (49), 13 states have return successors, (47), 23 states have call predecessors, (47), 20 states have call successors, (47) [2021-11-16 20:35:07,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:09,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:10,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:12,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:35:15,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:37:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:37:38,241 INFO L93 Difference]: Finished difference Result 481 states and 550 transitions. [2021-11-16 20:37:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-16 20:37:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 3.533333333333333) internal successors, (159), 41 states have internal predecessors, (159), 21 states have call successors, (49), 8 states have call predecessors, (49), 13 states have return successors, (47), 23 states have call predecessors, (47), 20 states have call successors, (47) Word has length 199 [2021-11-16 20:37:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:37:38,244 INFO L225 Difference]: With dead ends: 481 [2021-11-16 20:37:38,244 INFO L226 Difference]: Without dead ends: 368 [2021-11-16 20:37:38,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 177.4s TimeCoverageRelationStatistics Valid=542, Invalid=7963, Unknown=59, NotChecked=366, Total=8930 [2021-11-16 20:37:38,246 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 474 mSDsluCounter, 2827 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 4774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2031 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-16 20:37:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 3001 Invalid, 4774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2543 Invalid, 0 Unknown, 2031 Unchecked, 12.9s Time] [2021-11-16 20:37:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-16 20:37:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 343. [2021-11-16 20:37:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 247 states have (on average 1.0809716599190284) internal successors, (267), 252 states have internal predecessors, (267), 56 states have call successors, (56), 35 states have call predecessors, (56), 39 states have return successors, (63), 55 states have call predecessors, (63), 55 states have call successors, (63) [2021-11-16 20:37:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 386 transitions. [2021-11-16 20:37:38,259 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 386 transitions. Word has length 199 [2021-11-16 20:37:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:37:38,260 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 386 transitions. [2021-11-16 20:37:38,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 3.533333333333333) internal successors, (159), 41 states have internal predecessors, (159), 21 states have call successors, (49), 8 states have call predecessors, (49), 13 states have return successors, (47), 23 states have call predecessors, (47), 20 states have call successors, (47) [2021-11-16 20:37:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 386 transitions. [2021-11-16 20:37:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-16 20:37:38,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:37:38,261 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:37:38,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 20:37:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-16 20:37:38,483 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:37:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:37:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash -982458048, now seen corresponding path program 1 times [2021-11-16 20:37:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:37:38,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70787876] [2021-11-16 20:37:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:37:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:37:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:37:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:37:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:37:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:37:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:37:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:37:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:37:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:37:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:37:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:37:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:37:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:37:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:37:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:37:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-16 20:37:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:37:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:37:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:37:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-16 20:37:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-16 20:37:39,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:37:39,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70787876] [2021-11-16 20:37:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70787876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:37:39,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818166600] [2021-11-16 20:37:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:37:39,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:37:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:37:39,224 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:37:39,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 20:37:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:37:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2882 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-16 20:37:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:37:41,463 INFO L354 Elim1Store]: treesize reduction 453, result has 16.9 percent of original size [2021-11-16 20:37:41,463 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 6 case distinctions, treesize of input 79 treesize of output 122 [2021-11-16 20:37:41,586 INFO L354 Elim1Store]: treesize reduction 168, result has 23.3 percent of original size [2021-11-16 20:37:41,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 120 [2021-11-16 20:38:04,130 INFO L354 Elim1Store]: treesize reduction 170, result has 22.4 percent of original size [2021-11-16 20:38:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 118 [2021-11-16 20:38:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 78 proven. 178 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-16 20:38:13,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:38:21,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818166600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:38:21,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 20:38:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-11-16 20:38:21,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335061834] [2021-11-16 20:38:21,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 20:38:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 20:38:21,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:38:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 20:38:21,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1332, Unknown=3, NotChecked=0, Total=1482 [2021-11-16 20:38:21,925 INFO L87 Difference]: Start difference. First operand 343 states and 386 transitions. Second operand has 31 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 12 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (47), 12 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-16 20:38:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:31,003 INFO L93 Difference]: Finished difference Result 624 states and 732 transitions. [2021-11-16 20:38:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-16 20:38:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 12 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (47), 12 states have call predecessors, (47), 11 states have call successors, (47) Word has length 199 [2021-11-16 20:38:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:31,006 INFO L225 Difference]: With dead ends: 624 [2021-11-16 20:38:31,006 INFO L226 Difference]: Without dead ends: 535 [2021-11-16 20:38:31,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 257 SyntacticMatches, 14 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=760, Invalid=4492, Unknown=4, NotChecked=0, Total=5256 [2021-11-16 20:38:31,007 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 300 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 3763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1853 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:31,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1577 Invalid, 3763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1675 Invalid, 0 Unknown, 1853 Unchecked, 3.8s Time] [2021-11-16 20:38:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-16 20:38:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 475. [2021-11-16 20:38:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 340 states have (on average 1.0647058823529412) internal successors, (362), 347 states have internal predecessors, (362), 80 states have call successors, (80), 49 states have call predecessors, (80), 54 states have return successors, (94), 78 states have call predecessors, (94), 79 states have call successors, (94) [2021-11-16 20:38:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 536 transitions. [2021-11-16 20:38:31,032 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 536 transitions. Word has length 199 [2021-11-16 20:38:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:31,033 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 536 transitions. [2021-11-16 20:38:31,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 12 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (47), 12 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-16 20:38:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 536 transitions. [2021-11-16 20:38:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-16 20:38:31,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:31,035 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:31,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 20:38:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-16 20:38:31,255 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash -724292610, now seen corresponding path program 1 times [2021-11-16 20:38:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:38:31,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383450862] [2021-11-16 20:38:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:31,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:38:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:38:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:38:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:38:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:38:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:38:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:38:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:38:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:38:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 20:38:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 20:38:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-16 20:38:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:38:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:38:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:38:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:38:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-16 20:38:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:38:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:38:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-16 20:38:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-16 20:38:31,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:38:31,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383450862] [2021-11-16 20:38:31,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383450862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 20:38:31,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 20:38:31,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 20:38:31,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726180504] [2021-11-16 20:38:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 20:38:31,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 20:38:31,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 20:38:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 20:38:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 20:38:31,560 INFO L87 Difference]: Start difference. First operand 475 states and 536 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-16 20:38:33,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 20:38:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 20:38:34,790 INFO L93 Difference]: Finished difference Result 569 states and 655 transitions. [2021-11-16 20:38:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 20:38:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 199 [2021-11-16 20:38:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 20:38:34,792 INFO L225 Difference]: With dead ends: 569 [2021-11-16 20:38:34,792 INFO L226 Difference]: Without dead ends: 478 [2021-11-16 20:38:34,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-16 20:38:34,793 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 232 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-16 20:38:34,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 476 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-16 20:38:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-16 20:38:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 473. [2021-11-16 20:38:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 338 states have (on average 1.0562130177514792) internal successors, (357), 345 states have internal predecessors, (357), 80 states have call successors, (80), 49 states have call predecessors, (80), 54 states have return successors, (94), 78 states have call predecessors, (94), 79 states have call successors, (94) [2021-11-16 20:38:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 531 transitions. [2021-11-16 20:38:34,814 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 531 transitions. Word has length 199 [2021-11-16 20:38:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 20:38:34,815 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 531 transitions. [2021-11-16 20:38:34,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (26), 5 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-16 20:38:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 531 transitions. [2021-11-16 20:38:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-16 20:38:34,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 20:38:34,816 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 20:38:34,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-16 20:38:34,817 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 20:38:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 20:38:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1307158718, now seen corresponding path program 1 times [2021-11-16 20:38:34,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 20:38:34,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215558145] [2021-11-16 20:38:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:34,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 20:38:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 20:38:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 20:38:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 20:38:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-16 20:38:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-16 20:38:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 20:38:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 20:38:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-16 20:38:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 20:38:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 20:38:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 20:38:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 20:38:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 20:38:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 20:38:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 20:38:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:38:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 20:38:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 20:38:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 20:38:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 20:38:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-16 20:38:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-16 20:38:35,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 20:38:35,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215558145] [2021-11-16 20:38:35,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215558145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 20:38:35,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908507096] [2021-11-16 20:38:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 20:38:35,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 20:38:35,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 20:38:35,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 20:38:35,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 20:38:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 20:38:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-16 20:38:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 20:38:36,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-16 20:38:47,837 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-16 20:38:47,837 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 26 treesize of output 24 [2021-11-16 20:38:47,997 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-16 20:38:47,998 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 40 treesize of output 32 [2021-11-16 20:38:48,739 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 9 treesize of output 3 [2021-11-16 20:38:49,044 INFO L354 Elim1Store]: treesize reduction 505, result has 7.3 percent of original size [2021-11-16 20:38:49,044 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 6 case distinctions, treesize of input 81 treesize of output 76 [2021-11-16 20:38:49,116 INFO L354 Elim1Store]: treesize reduction 188, result has 14.2 percent of original size [2021-11-16 20:38:49,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 54 [2021-11-16 20:38:49,122 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-16 20:38:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-11-16 20:38:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 183 proven. 74 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-16 20:38:49,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 20:39:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-16 20:39:28,850 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 31858 treesize of output 29676 Killed by 15