./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_write_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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:02:25,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:02:25,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:02:25,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:02:25,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:02:25,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:02:25,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:02:25,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:02:25,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:02:25,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:02:25,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:02:25,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:02:25,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:02:25,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:02:25,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:02:25,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:02:25,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:02:25,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:02:25,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:02:25,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:02:25,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:02:25,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:02:25,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:02:25,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:02:25,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:02:25,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:02:25,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:02:25,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:02:25,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:02:25,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:02:25,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:02:25,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:02:25,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:02:25,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:02:25,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:02:25,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:02:25,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:02:25,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:02:25,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:02:25,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:02:25,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:02:25,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:02:25,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:02:25,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:02:25,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:02:25,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:02:25,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:02:25,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:02:25,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:02:25,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:02:25,172 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:02:25,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:02:25,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:02:25,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:02:25,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:02:25,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:02:25,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:02:25,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:02:25,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:02:25,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:02:25,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:02:25,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:02:25,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:02:25,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:02:25,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:02:25,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:02:25,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:02:25,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:02:25,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:02:25,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:02:25,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:02:25,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:02:25,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:02:25,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2021-12-14 17:02:25,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:02:25,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:02:25,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:02:25,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:02:25,398 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:02:25,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-12-14 17:02:25,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826dd8e68/fa174a7fc04d4b29aa506786b89b239c/FLAGe03c53142 [2021-12-14 17:02:26,040 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:02:26,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-12-14 17:02:26,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826dd8e68/fa174a7fc04d4b29aa506786b89b239c/FLAGe03c53142 [2021-12-14 17:02:26,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826dd8e68/fa174a7fc04d4b29aa506786b89b239c [2021-12-14 17:02:26,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:02:26,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:02:26,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:02:26,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:02:26,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:02:26,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:02:26" (1/1) ... [2021-12-14 17:02:26,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729d3bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:26, skipping insertion in model container [2021-12-14 17:02:26,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:02:26" (1/1) ... [2021-12-14 17:02:26,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:02:26,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:02:26,769 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_write_harness.i[4492,4505] [2021-12-14 17:02:26,774 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_write_harness.i[4552,4565] [2021-12-14 17:02:27,221 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,224 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,233 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,234 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,431 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:02:27,432 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:02:27,433 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:02:27,434 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:02:27,435 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:02:27,436 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:02:27,437 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:02:27,437 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:02:27,438 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:02:27,439 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:02:27,540 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:02:27,633 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,634 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:02:27,728 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:02:27,745 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_write_harness.i[4492,4505] [2021-12-14 17:02:27,746 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_write_harness.i[4552,4565] [2021-12-14 17:02:27,770 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,770 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,775 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,801 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:02:27,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:02:27,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:02:27,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:02:27,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:02:27,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:02:27,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:02:27,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:02:27,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:02:27,805 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:02:27,841 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:02:27,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:02:27,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:02:28,067 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:02:28,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28 WrapperNode [2021-12-14 17:02:28,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:02:28,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:02:28,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:02:28,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:02:28,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,204 INFO L137 Inliner]: procedures = 690, calls = 2637, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 871 [2021-12-14 17:02:28,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:02:28,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:02:28,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:02:28,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:02:28,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:02:28,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:02:28,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:02:28,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:02:28,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (1/1) ... [2021-12-14 17:02:28,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:02:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:28,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:02:28,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:02:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-14 17:02:28,361 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-14 17:02:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:02:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:02:28,361 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:02:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-12-14 17:02:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:02:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:02:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:02:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:02:28,363 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:02:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:02:28,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:02:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:02:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:02:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:02:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:02:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:02:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:02:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:02:28,366 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:02:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:02:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:02:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-12-14 17:02:28,366 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-12-14 17:02:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:02:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:02:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:02:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:02:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:02:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:02:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-12-14 17:02:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:02:28,591 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:02:28,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:02:29,466 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:02:29,471 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:02:29,471 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:02:29,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:02:29 BoogieIcfgContainer [2021-12-14 17:02:29,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:02:29,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:02:29,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:02:29,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:02:29,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:02:26" (1/3) ... [2021-12-14 17:02:29,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a86084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:02:29, skipping insertion in model container [2021-12-14 17:02:29,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:02:28" (2/3) ... [2021-12-14 17:02:29,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a86084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:02:29, skipping insertion in model container [2021-12-14 17:02:29,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:02:29" (3/3) ... [2021-12-14 17:02:29,478 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2021-12-14 17:02:29,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:02:29,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:02:29,510 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:02:29,515 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:02:29,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:02:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-14 17:02:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 17:02:29,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:29,533 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:29,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2021-12-14 17:02:29,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483457751] [2021-12-14 17:02:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:29,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:29,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 17:02:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:02:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 17:02:30,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483457751] [2021-12-14 17:02:30,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483457751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:30,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307330618] [2021-12-14 17:02:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:30,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:30,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:30,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:02:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:02:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 17:02:30,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307330618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:30,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:30,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-14 17:02:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616595860] [2021-12-14 17:02:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:30,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:02:30,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:02:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:02:30,827 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:31,009 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2021-12-14 17:02:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:02:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-12-14 17:02:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:31,017 INFO L225 Difference]: With dead ends: 258 [2021-12-14 17:02:31,018 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 17:02:31,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:02:31,023 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 202 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:31,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 467 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 17:02:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-14 17:02:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2021-12-14 17:02:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2021-12-14 17:02:31,056 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2021-12-14 17:02:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2021-12-14 17:02:31,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2021-12-14 17:02:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:02:31,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:31,061 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:31,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:31,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-14 17:02:31,275 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2021-12-14 17:02:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204952913] [2021-12-14 17:02:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:31,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:02:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 17:02:31,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204952913] [2021-12-14 17:02:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204952913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925505516] [2021-12-14 17:02:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:31,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:31,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:31,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:02:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:02:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 17:02:32,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:32,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925505516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:32,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:32,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-14 17:02:32,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192418674] [2021-12-14 17:02:32,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:02:32,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:02:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:02:32,183 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:02:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:32,406 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2021-12-14 17:02:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:02:32,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-12-14 17:02:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:32,408 INFO L225 Difference]: With dead ends: 220 [2021-12-14 17:02:32,408 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 17:02:32,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:02:32,410 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 207 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:32,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 640 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:02:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 17:02:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-14 17:02:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-14 17:02:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-14 17:02:32,420 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2021-12-14 17:02:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:32,420 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-14 17:02:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 17:02:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-14 17:02:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 17:02:32,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:32,429 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:32,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:32,639 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,SelfDestructingSolverStorable1 [2021-12-14 17:02:32,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2021-12-14 17:02:32,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494599584] [2021-12-14 17:02:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:32,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:02:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 17:02:32,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:32,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494599584] [2021-12-14 17:02:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494599584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:32,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:02:32,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:02:32,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928180641] [2021-12-14 17:02:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:32,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:32,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:02:32,920 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:02:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:33,450 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2021-12-14 17:02:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 95 [2021-12-14 17:02:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:33,453 INFO L225 Difference]: With dead ends: 136 [2021-12-14 17:02:33,453 INFO L226 Difference]: Without dead ends: 134 [2021-12-14 17:02:33,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:02:33,454 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 86 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:33,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 746 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:02:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-14 17:02:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-14 17:02:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 89 states have internal predecessors, (107), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-12-14 17:02:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2021-12-14 17:02:33,463 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 95 [2021-12-14 17:02:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:33,463 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2021-12-14 17:02:33,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:02:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2021-12-14 17:02:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 17:02:33,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:33,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:33,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:02:33,465 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash -364356006, now seen corresponding path program 1 times [2021-12-14 17:02:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:33,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944893468] [2021-12-14 17:02:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:33,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:02:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:02:33,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944893468] [2021-12-14 17:02:33,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944893468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:33,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:02:33,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:02:33,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86299041] [2021-12-14 17:02:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:33,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:02:33,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:02:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:33,810 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:02:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:34,201 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2021-12-14 17:02:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:02:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 99 [2021-12-14 17:02:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:34,203 INFO L225 Difference]: With dead ends: 267 [2021-12-14 17:02:34,203 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 17:02:34,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:02:34,205 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:34,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 439 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:02:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 17:02:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-12-14 17:02:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-12-14 17:02:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-12-14 17:02:34,214 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 99 [2021-12-14 17:02:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:34,214 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-12-14 17:02:34,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 17:02:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-12-14 17:02:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 17:02:34,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:34,215 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:34,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:02:34,226 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -106190568, now seen corresponding path program 1 times [2021-12-14 17:02:34,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:34,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708364309] [2021-12-14 17:02:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:34,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:02:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 17:02:34,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708364309] [2021-12-14 17:02:34,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708364309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172730109] [2021-12-14 17:02:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:34,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:34,695 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:34,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:02:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-14 17:02:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:35,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:02:36,080 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 63 treesize of output 47 [2021-12-14 17:02:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:02:36,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:36,751 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 28 treesize of output 24 [2021-12-14 17:02:36,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-14 17:02:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 17:02:37,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172730109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:37,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:37,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 41 [2021-12-14 17:02:37,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107040988] [2021-12-14 17:02:37,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:37,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-14 17:02:37,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-14 17:02:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-12-14 17:02:37,044 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) [2021-12-14 17:02:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:41,158 INFO L93 Difference]: Finished difference Result 432 states and 623 transitions. [2021-12-14 17:02:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 17:02:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) Word has length 99 [2021-12-14 17:02:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:41,161 INFO L225 Difference]: With dead ends: 432 [2021-12-14 17:02:41,161 INFO L226 Difference]: Without dead ends: 333 [2021-12-14 17:02:41,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 188 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=545, Invalid=5617, Unknown=0, NotChecked=0, Total=6162 [2021-12-14 17:02:41,164 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 543 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:41,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2750 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3557 Invalid, 0 Unknown, 793 Unchecked, 2.7s Time] [2021-12-14 17:02:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-14 17:02:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 218. [2021-12-14 17:02:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 152 states have (on average 1.25) internal successors, (190), 155 states have internal predecessors, (190), 48 states have call successors, (48), 14 states have call predecessors, (48), 17 states have return successors, (70), 48 states have call predecessors, (70), 47 states have call successors, (70) [2021-12-14 17:02:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 308 transitions. [2021-12-14 17:02:41,191 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 308 transitions. Word has length 99 [2021-12-14 17:02:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:41,192 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 308 transitions. [2021-12-14 17:02:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) [2021-12-14 17:02:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 308 transitions. [2021-12-14 17:02:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 17:02:41,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:41,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:41,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:41,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:41,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 112664150, now seen corresponding path program 1 times [2021-12-14 17:02:41,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445892896] [2021-12-14 17:02:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:41,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:02:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:02:41,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445892896] [2021-12-14 17:02:41,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445892896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658654117] [2021-12-14 17:02:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:41,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:41,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:02:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 17:02:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:02:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:02:42,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:42,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658654117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:42,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:42,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 19 [2021-12-14 17:02:42,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103651082] [2021-12-14 17:02:42,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:02:42,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:02:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:02:42,661 INFO L87 Difference]: Start difference. First operand 218 states and 308 transitions. Second operand has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 17:02:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:42,892 INFO L93 Difference]: Finished difference Result 468 states and 663 transitions. [2021-12-14 17:02:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:02:42,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 99 [2021-12-14 17:02:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:42,895 INFO L225 Difference]: With dead ends: 468 [2021-12-14 17:02:42,895 INFO L226 Difference]: Without dead ends: 320 [2021-12-14 17:02:42,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:02:42,897 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 55 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1694 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2021-12-14 17:02:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-14 17:02:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 282. [2021-12-14 17:02:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 205 states have (on average 1.2536585365853659) internal successors, (257), 209 states have internal predecessors, (257), 54 states have call successors, (54), 20 states have call predecessors, (54), 22 states have return successors, (81), 52 states have call predecessors, (81), 53 states have call successors, (81) [2021-12-14 17:02:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 392 transitions. [2021-12-14 17:02:42,913 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 392 transitions. Word has length 99 [2021-12-14 17:02:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:42,914 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 392 transitions. [2021-12-14 17:02:42,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 17:02:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 392 transitions. [2021-12-14 17:02:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:02:42,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:42,916 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:42,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:43,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1349065372, now seen corresponding path program 2 times [2021-12-14 17:02:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472734266] [2021-12-14 17:02:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 17:02:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:02:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:02:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:02:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:02:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:02:43,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472734266] [2021-12-14 17:02:43,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472734266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975588810] [2021-12-14 17:02:43,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:02:43,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:43,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:43,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:02:44,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:02:44,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:02:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 17:02:44,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:44,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975588810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:44,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:44,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:02:44,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683330886] [2021-12-14 17:02:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:44,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:44,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:02:44,374 INFO L87 Difference]: Start difference. First operand 282 states and 392 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:44,462 INFO L93 Difference]: Finished difference Result 491 states and 703 transitions. [2021-12-14 17:02:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:44,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-12-14 17:02:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:44,465 INFO L225 Difference]: With dead ends: 491 [2021-12-14 17:02:44,465 INFO L226 Difference]: Without dead ends: 297 [2021-12-14 17:02:44,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:02:44,466 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 12 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:44,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1259 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-14 17:02:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 292. [2021-12-14 17:02:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.244131455399061) internal successors, (265), 219 states have internal predecessors, (265), 54 states have call successors, (54), 20 states have call predecessors, (54), 24 states have return successors, (99), 52 states have call predecessors, (99), 53 states have call successors, (99) [2021-12-14 17:02:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 418 transitions. [2021-12-14 17:02:44,484 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 418 transitions. Word has length 103 [2021-12-14 17:02:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:44,484 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 418 transitions. [2021-12-14 17:02:44,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 418 transitions. [2021-12-14 17:02:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:02:44,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:44,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:44,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:44,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:44,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash 878913731, now seen corresponding path program 1 times [2021-12-14 17:02:44,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:44,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809081271] [2021-12-14 17:02:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:02:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:02:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:02:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 17:02:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809081271] [2021-12-14 17:02:44,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809081271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838735840] [2021-12-14 17:02:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:44,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:44,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:44,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:02:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:02:45,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:45,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838735840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:45,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:45,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:45,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296928642] [2021-12-14 17:02:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:45,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:45,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:45,360 INFO L87 Difference]: Start difference. First operand 292 states and 418 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:45,385 INFO L93 Difference]: Finished difference Result 506 states and 754 transitions. [2021-12-14 17:02:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 105 [2021-12-14 17:02:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:45,388 INFO L225 Difference]: With dead ends: 506 [2021-12-14 17:02:45,388 INFO L226 Difference]: Without dead ends: 302 [2021-12-14 17:02:45,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:45,389 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 9 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 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 [2021-12-14 17:02:45,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-14 17:02:45,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 294. [2021-12-14 17:02:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 215 states have (on average 1.2325581395348837) internal successors, (265), 221 states have internal predecessors, (265), 54 states have call successors, (54), 20 states have call predecessors, (54), 24 states have return successors, (99), 52 states have call predecessors, (99), 53 states have call successors, (99) [2021-12-14 17:02:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 418 transitions. [2021-12-14 17:02:45,409 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 418 transitions. Word has length 105 [2021-12-14 17:02:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:45,409 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 418 transitions. [2021-12-14 17:02:45,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 418 transitions. [2021-12-14 17:02:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 17:02:45,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:45,412 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:45,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:45,627 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 [2021-12-14 17:02:45,627 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 536310872, now seen corresponding path program 1 times [2021-12-14 17:02:45,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620668509] [2021-12-14 17:02:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:45,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 17:02:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:02:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 17:02:45,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620668509] [2021-12-14 17:02:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620668509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684794183] [2021-12-14 17:02:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:45,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:45,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:45,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:02:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 17:02:46,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:46,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684794183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:46,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:46,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:46,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255016795] [2021-12-14 17:02:46,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:46,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:46,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:46,244 INFO L87 Difference]: Start difference. First operand 294 states and 418 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:46,269 INFO L93 Difference]: Finished difference Result 485 states and 694 transitions. [2021-12-14 17:02:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-12-14 17:02:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:46,270 INFO L225 Difference]: With dead ends: 485 [2021-12-14 17:02:46,271 INFO L226 Difference]: Without dead ends: 271 [2021-12-14 17:02:46,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:46,272 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 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 [2021-12-14 17:02:46,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-14 17:02:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 261. [2021-12-14 17:02:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 189 states have (on average 1.2116402116402116) internal successors, (229), 192 states have internal predecessors, (229), 51 states have call successors, (51), 18 states have call predecessors, (51), 20 states have return successors, (84), 50 states have call predecessors, (84), 50 states have call successors, (84) [2021-12-14 17:02:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 364 transitions. [2021-12-14 17:02:46,282 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 364 transitions. Word has length 99 [2021-12-14 17:02:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:46,283 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 364 transitions. [2021-12-14 17:02:46,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 364 transitions. [2021-12-14 17:02:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 17:02:46,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:46,284 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:46,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:46,503 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 [2021-12-14 17:02:46,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -419718323, now seen corresponding path program 1 times [2021-12-14 17:02:46,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471765515] [2021-12-14 17:02:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:46,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:02:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:02:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:02:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 17:02:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 17:02:46,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471765515] [2021-12-14 17:02:46,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471765515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:46,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432314746] [2021-12-14 17:02:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:46,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:46,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:02:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 2645 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:02:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:02:47,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:47,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432314746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:47,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:47,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-14 17:02:47,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899503074] [2021-12-14 17:02:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:47,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:02:47,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:02:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:02:47,145 INFO L87 Difference]: Start difference. First operand 261 states and 364 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:47,165 INFO L93 Difference]: Finished difference Result 457 states and 651 transitions. [2021-12-14 17:02:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:02:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2021-12-14 17:02:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:47,167 INFO L225 Difference]: With dead ends: 457 [2021-12-14 17:02:47,167 INFO L226 Difference]: Without dead ends: 232 [2021-12-14 17:02:47,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:02:47,168 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 34 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:47,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 484 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:02:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-14 17:02:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2021-12-14 17:02:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.167741935483871) internal successors, (181), 158 states have internal predecessors, (181), 48 states have call successors, (48), 16 states have call predecessors, (48), 19 states have return successors, (69), 48 states have call predecessors, (69), 47 states have call successors, (69) [2021-12-14 17:02:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 298 transitions. [2021-12-14 17:02:47,177 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 298 transitions. Word has length 109 [2021-12-14 17:02:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 298 transitions. [2021-12-14 17:02:47,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 17:02:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 298 transitions. [2021-12-14 17:02:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:02:47,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:47,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:02:47,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:47,389 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 [2021-12-14 17:02:47,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash -423036132, now seen corresponding path program 3 times [2021-12-14 17:02:47,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:47,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481614677] [2021-12-14 17:02:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:47,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:02:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:02:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:02:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-14 17:02:47,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481614677] [2021-12-14 17:02:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481614677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144098725] [2021-12-14 17:02:47,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 17:02:47,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:47,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:47,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:47,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:02:48,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 17:02:48,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:02:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 17:02:48,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:48,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144098725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:48,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:48,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-14 17:02:48,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780857788] [2021-12-14 17:02:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:48,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:02:48,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:02:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:02:48,667 INFO L87 Difference]: Start difference. First operand 223 states and 298 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:48,757 INFO L93 Difference]: Finished difference Result 370 states and 499 transitions. [2021-12-14 17:02:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:02:48,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-12-14 17:02:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:48,759 INFO L225 Difference]: With dead ends: 370 [2021-12-14 17:02:48,759 INFO L226 Difference]: Without dead ends: 202 [2021-12-14 17:02:48,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:02:48,760 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 12 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:48,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1239 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:02:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-14 17:02:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2021-12-14 17:02:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 131 states have (on average 1.183206106870229) internal successors, (155), 132 states have internal predecessors, (155), 46 states have call successors, (46), 15 states have call predecessors, (46), 16 states have return successors, (57), 46 states have call predecessors, (57), 45 states have call successors, (57) [2021-12-14 17:02:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2021-12-14 17:02:48,770 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 103 [2021-12-14 17:02:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:48,771 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2021-12-14 17:02:48,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 17:02:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2021-12-14 17:02:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:02:48,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:48,773 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:48,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:49,017 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 [2021-12-14 17:02:49,017 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -852360631, now seen corresponding path program 1 times [2021-12-14 17:02:49,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488586434] [2021-12-14 17:02:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:49,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:02:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:02:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:02:49,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:49,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488586434] [2021-12-14 17:02:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488586434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:49,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757577620] [2021-12-14 17:02:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:49,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:49,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:49,356 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:49,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:02:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 17:02:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:02:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 17:02:50,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:02:50,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757577620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:50,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:50,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 31 [2021-12-14 17:02:50,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790804713] [2021-12-14 17:02:50,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:50,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 17:02:50,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 17:02:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:02:50,820 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand has 31 states, 29 states have (on average 4.724137931034483) internal successors, (137), 27 states have internal predecessors, (137), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 17:02:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:53,935 INFO L93 Difference]: Finished difference Result 518 states and 758 transitions. [2021-12-14 17:02:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 17:02:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.724137931034483) internal successors, (137), 27 states have internal predecessors, (137), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 105 [2021-12-14 17:02:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:53,937 INFO L225 Difference]: With dead ends: 518 [2021-12-14 17:02:53,937 INFO L226 Difference]: Without dead ends: 363 [2021-12-14 17:02:53,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=442, Invalid=3340, Unknown=0, NotChecked=0, Total=3782 [2021-12-14 17:02:53,939 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 605 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:53,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1286 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 2784 Invalid, 0 Unknown, 655 Unchecked, 2.3s Time] [2021-12-14 17:02:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-14 17:02:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 276. [2021-12-14 17:02:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 186 states have (on average 1.1774193548387097) internal successors, (219), 190 states have internal predecessors, (219), 69 states have call successors, (69), 17 states have call predecessors, (69), 20 states have return successors, (99), 68 states have call predecessors, (99), 68 states have call successors, (99) [2021-12-14 17:02:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 387 transitions. [2021-12-14 17:02:53,953 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 387 transitions. Word has length 105 [2021-12-14 17:02:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:53,953 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 387 transitions. [2021-12-14 17:02:53,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.724137931034483) internal successors, (137), 27 states have internal predecessors, (137), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 17:02:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 387 transitions. [2021-12-14 17:02:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:02:53,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:53,954 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:53,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:54,167 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 [2021-12-14 17:02:54,167 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1276007353, now seen corresponding path program 1 times [2021-12-14 17:02:54,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324866927] [2021-12-14 17:02:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:54,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:02:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 17:02:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:02:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:02:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:02:54,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:54,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324866927] [2021-12-14 17:02:54,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324866927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:54,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327013341] [2021-12-14 17:02:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:54,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:54,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:54,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:54,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:02:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 17:02:54,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:54,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:02:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 17:02:55,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:02:55,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327013341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:02:55,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:02:55,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-14 17:02:55,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659910770] [2021-12-14 17:02:55,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:02:55,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:02:55,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:02:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:02:55,184 INFO L87 Difference]: Start difference. First operand 276 states and 387 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:02:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:02:55,259 INFO L93 Difference]: Finished difference Result 430 states and 584 transitions. [2021-12-14 17:02:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:02:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 105 [2021-12-14 17:02:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:02:55,261 INFO L225 Difference]: With dead ends: 430 [2021-12-14 17:02:55,261 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 17:02:55,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:02:55,262 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 55 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:02:55,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 675 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-14 17:02:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 17:02:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-12-14 17:02:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 160 states have (on average 1.1875) internal successors, (190), 163 states have internal predecessors, (190), 58 states have call successors, (58), 14 states have call predecessors, (58), 16 states have return successors, (80), 57 states have call predecessors, (80), 57 states have call successors, (80) [2021-12-14 17:02:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2021-12-14 17:02:55,273 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 105 [2021-12-14 17:02:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:02:55,273 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2021-12-14 17:02:55,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 17:02:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2021-12-14 17:02:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:02:55,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:02:55,274 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:02:55,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:02:55,492 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 [2021-12-14 17:02:55,492 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:02:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:02:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 150904329, now seen corresponding path program 2 times [2021-12-14 17:02:55,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:02:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572599843] [2021-12-14 17:02:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:02:55,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:02:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:02:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:02:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:02:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:02:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:02:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:02:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:02:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:02:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:02:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:02:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:02:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:02:55,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:02:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572599843] [2021-12-14 17:02:55,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572599843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:02:55,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78887395] [2021-12-14 17:02:55,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:02:55,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:02:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:02:55,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:02:55,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:02:56,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:02:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:02:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-14 17:02:56,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:02:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 17:02:57,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:02:57,898 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-14 17:02:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-12-14 17:02:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 17:02:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78887395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:02:57,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:02:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 30 [2021-12-14 17:02:57,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083741781] [2021-12-14 17:02:57,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:02:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 17:02:57,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:02:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 17:02:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:02:57,967 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:03:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:00,325 INFO L93 Difference]: Finished difference Result 517 states and 728 transitions. [2021-12-14 17:03:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 17:03:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 105 [2021-12-14 17:03:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:00,327 INFO L225 Difference]: With dead ends: 517 [2021-12-14 17:03:00,327 INFO L226 Difference]: Without dead ends: 333 [2021-12-14 17:03:00,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 210 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=2294, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 17:03:00,329 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 274 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:00,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 2055 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2488 Invalid, 0 Unknown, 295 Unchecked, 1.8s Time] [2021-12-14 17:03:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-14 17:03:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 272. [2021-12-14 17:03:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 191 states have (on average 1.1832460732984293) internal successors, (226), 193 states have internal predecessors, (226), 62 states have call successors, (62), 16 states have call predecessors, (62), 18 states have return successors, (85), 62 states have call predecessors, (85), 61 states have call successors, (85) [2021-12-14 17:03:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 373 transitions. [2021-12-14 17:03:00,340 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 373 transitions. Word has length 105 [2021-12-14 17:03:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:00,340 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 373 transitions. [2021-12-14 17:03:00,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 17:03:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 373 transitions. [2021-12-14 17:03:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 17:03:00,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:00,342 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-14 17:03:00,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:00,555 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 [2021-12-14 17:03:00,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 568300935, now seen corresponding path program 2 times [2021-12-14 17:03:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97846502] [2021-12-14 17:03:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:03:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:03:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:03:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:03:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:03:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:03:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:03:00,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97846502] [2021-12-14 17:03:00,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97846502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096052311] [2021-12-14 17:03:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:03:00,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:00,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:00,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:03:01,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:03:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:03:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-14 17:03:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 17:03:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 17:03:02,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:03:02,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096052311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:03:02,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:03:02,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 19 [2021-12-14 17:03:02,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387849625] [2021-12-14 17:03:02,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:03:02,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:03:02,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:02,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:03:02,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:03:02,180 INFO L87 Difference]: Start difference. First operand 272 states and 373 transitions. Second operand has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 17:03:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:02,308 INFO L93 Difference]: Finished difference Result 510 states and 692 transitions. [2021-12-14 17:03:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:03:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 105 [2021-12-14 17:03:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:02,310 INFO L225 Difference]: With dead ends: 510 [2021-12-14 17:03:02,310 INFO L226 Difference]: Without dead ends: 323 [2021-12-14 17:03:02,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:03:02,312 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 85 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:02,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1065 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-12-14 17:03:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-14 17:03:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-12-14 17:03:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 204 states have (on average 1.1715686274509804) internal successors, (239), 208 states have internal predecessors, (239), 60 states have call successors, (60), 17 states have call predecessors, (60), 20 states have return successors, (82), 59 states have call predecessors, (82), 59 states have call successors, (82) [2021-12-14 17:03:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 381 transitions. [2021-12-14 17:03:02,323 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 381 transitions. Word has length 105 [2021-12-14 17:03:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:02,323 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 381 transitions. [2021-12-14 17:03:02,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 17:03:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 381 transitions. [2021-12-14 17:03:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:03:02,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:02,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:02,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:02,543 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 [2021-12-14 17:03:02,543 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2056242484, now seen corresponding path program 1 times [2021-12-14 17:03:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905529962] [2021-12-14 17:03:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:02,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:03:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:03:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:03:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:03:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:03:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:03:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:03:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:03:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 17:03:03,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905529962] [2021-12-14 17:03:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905529962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525542208] [2021-12-14 17:03:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:03,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:03,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:03:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-14 17:03:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:03,521 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 [2021-12-14 17:03:03,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 17:03:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:03:03,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 17:03:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:03:03,940 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-14 17:03:03,941 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 17 treesize of output 22 [2021-12-14 17:03:04,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:03:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:03:04,771 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-12-14 17:03:04,771 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 31 treesize of output 35 [2021-12-14 17:03:04,814 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 27 treesize of output 27 [2021-12-14 17:03:10,941 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 27 treesize of output 27 [2021-12-14 17:03:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 74 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 17:03:17,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:17,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_923 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_923) |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.offset| 8)) 0))) is different from false [2021-12-14 17:03:17,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525542208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:17,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:03:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 42 [2021-12-14 17:03:17,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442351733] [2021-12-14 17:03:17,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:17,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-14 17:03:17,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-14 17:03:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2187, Unknown=4, NotChecked=94, Total=2450 [2021-12-14 17:03:17,811 INFO L87 Difference]: Start difference. First operand 285 states and 381 transitions. Second operand has 42 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 35 states have internal predecessors, (136), 15 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-14 17:03:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:03:22,074 INFO L93 Difference]: Finished difference Result 560 states and 739 transitions. [2021-12-14 17:03:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 17:03:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 35 states have internal predecessors, (136), 15 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 112 [2021-12-14 17:03:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:03:22,076 INFO L225 Difference]: With dead ends: 560 [2021-12-14 17:03:22,077 INFO L226 Difference]: Without dead ends: 400 [2021-12-14 17:03:22,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 166 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=465, Invalid=6340, Unknown=5, NotChecked=162, Total=6972 [2021-12-14 17:03:22,080 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 291 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1189 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:03:22,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 1731 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1719 Invalid, 0 Unknown, 1189 Unchecked, 1.3s Time] [2021-12-14 17:03:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-14 17:03:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2021-12-14 17:03:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 282 states have (on average 1.148936170212766) internal successors, (324), 289 states have internal predecessors, (324), 74 states have call successors, (74), 23 states have call predecessors, (74), 29 states have return successors, (109), 73 states have call predecessors, (109), 73 states have call successors, (109) [2021-12-14 17:03:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 507 transitions. [2021-12-14 17:03:22,095 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 507 transitions. Word has length 112 [2021-12-14 17:03:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:03:22,096 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 507 transitions. [2021-12-14 17:03:22,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 35 states have internal predecessors, (136), 15 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-14 17:03:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 507 transitions. [2021-12-14 17:03:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 17:03:22,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:03:22,097 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:03:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:03:22,318 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 [2021-12-14 17:03:22,318 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:03:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:03:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash -374684294, now seen corresponding path program 1 times [2021-12-14 17:03:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:03:22,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124058164] [2021-12-14 17:03:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:22,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:03:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:03:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:03:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:03:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:03:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:03:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:03:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-14 17:03:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 17:03:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:03:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:03:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-14 17:03:22,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:03:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124058164] [2021-12-14 17:03:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124058164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:03:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110732867] [2021-12-14 17:03:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:03:22,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:03:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:03:22,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:03:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:03:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:03:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 17:03:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:03:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:03:23,960 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 63 treesize of output 47 [2021-12-14 17:03:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 17:03:24,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:03:24,463 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 28 treesize of output 24 [2021-12-14 17:03:24,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-14 17:03:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-14 17:03:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110732867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:03:24,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:03:24,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 39 [2021-12-14 17:03:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816139929] [2021-12-14 17:03:24,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:03:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-14 17:03:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:03:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-14 17:03:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 17:03:24,724 INFO L87 Difference]: Start difference. First operand 386 states and 507 transitions. Second operand has 39 states, 34 states have (on average 4.411764705882353) internal successors, (150), 32 states have internal predecessors, (150), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31)