./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_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 d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:35:42,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:35:42,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:35:42,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:35:42,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:35:42,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:35:42,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:35:42,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:35:42,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:35:42,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:35:42,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:35:42,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:35:42,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:35:42,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:35:42,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:35:42,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:35:42,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:35:42,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:35:42,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:35:42,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:35:42,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:35:42,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:35:42,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:35:42,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:35:42,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:35:42,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:35:42,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:35:42,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:35:42,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:35:42,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:35:42,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:35:42,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:35:42,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:35:42,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:35:42,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:35:42,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:35:42,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:35:42,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:35:42,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:35:42,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:35:42,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:35:42,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:35:42,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:35:42,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:35:42,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:35:42,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:35:42,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:35:42,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:35:42,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:35:42,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:35:42,360 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:35:42,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:35:42,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:35:42,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:35:42,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:35:42,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:35:42,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:35:42,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:35:42,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:35:42,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:35:42,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:35:42,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:35:42,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:35:42,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d155cc00d5c2ba6f5ef1d5e883c6d133605de01ed97e4300960f893025d81fd1 [2021-12-21 15:35:42,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:35:42,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:35:42,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:35:42,581 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:35:42,582 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:35:42,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-12-21 15:35:42,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8424bd7d7/f7ca27dca434448daf14f27308d1abef/FLAGc1153527b [2021-12-21 15:35:43,081 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:35:43,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i [2021-12-21 15:35:43,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8424bd7d7/f7ca27dca434448daf14f27308d1abef/FLAGc1153527b [2021-12-21 15:35:43,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8424bd7d7/f7ca27dca434448daf14f27308d1abef [2021-12-21 15:35:43,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:35:43,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:35:43,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:35:43,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:35:43,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:35:43,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:35:43" (1/1) ... [2021-12-21 15:35:43,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f046bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:43, skipping insertion in model container [2021-12-21 15:35:43,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:35:43" (1/1) ... [2021-12-21 15:35:43,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:35:43,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:35:43,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-12-21 15:35:43,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-12-21 15:35:44,154 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,171 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,171 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,173 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:35:44,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:35:44,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:35:44,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:35:44,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:35:44,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:35:44,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:35:44,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:35:44,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:35:44,355 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:35:44,454 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:35:44,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:35:44,490 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:35:44,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4499,4512] [2021-12-21 15:35:44,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_push_back_harness.i[4559,4572] [2021-12-21 15:35:44,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,526 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,536 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,537 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,541 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,542 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,542 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:35:44,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:35:44,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:35:44,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:35:44,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:35:44,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:35:44,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:35:44,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:35:44,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:35:44,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:35:44,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:35:44,614 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:35:44,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:35:44,747 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:35:44,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44 WrapperNode [2021-12-21 15:35:44,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:35:44,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:35:44,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:35:44,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:35:44,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,837 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 150 [2021-12-21 15:35:44,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:35:44,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:35:44,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:35:44,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:35:44,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:35:44,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:35:44,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:35:44,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:35:44,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (1/1) ... [2021-12-21 15:35:44,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:35:44,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:35:44,937 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) [2021-12-21 15:35:44,938 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 [2021-12-21 15:35:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:35:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:35:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:35:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-21 15:35:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-21 15:35:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:35:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-21 15:35:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2021-12-21 15:35:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:35:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:35:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:35:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:35:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:35:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:35:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-21 15:35:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-21 15:35:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-21 15:35:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-21 15:35:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:35:45,146 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:35:45,147 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:35:45,328 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:35:45,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:35:45,332 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:35:45,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:35:45 BoogieIcfgContainer [2021-12-21 15:35:45,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:35:45,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:35:45,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:35:45,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:35:45,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:35:43" (1/3) ... [2021-12-21 15:35:45,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61218b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:35:45, skipping insertion in model container [2021-12-21 15:35:45,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:35:44" (2/3) ... [2021-12-21 15:35:45,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61218b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:35:45, skipping insertion in model container [2021-12-21 15:35:45,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:35:45" (3/3) ... [2021-12-21 15:35:45,342 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_back_harness.i [2021-12-21 15:35:45,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:35:45,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:35:45,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:35:45,378 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 [2021-12-21 15:35:45,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:35:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-21 15:35:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 15:35:45,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:45,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:45,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 524704703, now seen corresponding path program 1 times [2021-12-21 15:35:45,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142337987] [2021-12-21 15:35:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:45,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 15:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:35:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:35:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 15:35:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:45,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:45,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142337987] [2021-12-21 15:35:45,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142337987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:45,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:45,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:35:45,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6544415] [2021-12-21 15:35:45,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:35:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:35:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:35:45,875 INFO L87 Difference]: Start difference. First operand has 102 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 66 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 15:35:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:45,958 INFO L93 Difference]: Finished difference Result 208 states and 310 transitions. [2021-12-21 15:35:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:35:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-12-21 15:35:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:45,970 INFO L225 Difference]: With dead ends: 208 [2021-12-21 15:35:45,971 INFO L226 Difference]: Without dead ends: 109 [2021-12-21 15:35:45,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:35:45,980 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 21 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 398 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 [2021-12-21 15:35:45,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 398 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-21 15:35:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-12-21 15:35:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-21 15:35:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2021-12-21 15:35:46,022 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 73 [2021-12-21 15:35:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:46,023 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2021-12-21 15:35:46,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 15:35:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2021-12-21 15:35:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 15:35:46,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:46,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:46,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:35:46,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash -125862913, now seen corresponding path program 1 times [2021-12-21 15:35:46,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:46,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148268150] [2021-12-21 15:35:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:46,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 15:35:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:35:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:35:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 15:35:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:46,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:46,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148268150] [2021-12-21 15:35:46,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148268150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:46,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:46,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:35:46,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416767721] [2021-12-21 15:35:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:46,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:35:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:46,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:35:46,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:35:46,252 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 15:35:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:46,284 INFO L93 Difference]: Finished difference Result 192 states and 265 transitions. [2021-12-21 15:35:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:35:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-12-21 15:35:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:46,288 INFO L225 Difference]: With dead ends: 192 [2021-12-21 15:35:46,288 INFO L226 Difference]: Without dead ends: 107 [2021-12-21 15:35:46,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:35:46,290 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 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 [2021-12-21 15:35:46,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-21 15:35:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-12-21 15:35:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-21 15:35:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2021-12-21 15:35:46,308 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 73 [2021-12-21 15:35:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:46,310 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2021-12-21 15:35:46,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 15:35:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2021-12-21 15:35:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 15:35:46,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:46,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:46,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:35:46,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2140518273, now seen corresponding path program 1 times [2021-12-21 15:35:46,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34542276] [2021-12-21 15:35:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:46,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 15:35:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:35:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:35:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 15:35:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:46,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:46,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34542276] [2021-12-21 15:35:46,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34542276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:46,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:46,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:35:46,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595683793] [2021-12-21 15:35:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:46,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:35:46,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:35:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:35:46,499 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:46,568 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-12-21 15:35:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:35:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-12-21 15:35:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:46,571 INFO L225 Difference]: With dead ends: 192 [2021-12-21 15:35:46,571 INFO L226 Difference]: Without dead ends: 105 [2021-12-21 15:35:46,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:35:46,575 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 22 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:46,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 571 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-21 15:35:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-12-21 15:35:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-21 15:35:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-12-21 15:35:46,593 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-12-21 15:35:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-12-21 15:35:46,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-12-21 15:35:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 15:35:46,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:46,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:46,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:35:46,598 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2124999555, now seen corresponding path program 1 times [2021-12-21 15:35:46,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:46,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559932290] [2021-12-21 15:35:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:46,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 15:35:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:35:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:35:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 15:35:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:46,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:46,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559932290] [2021-12-21 15:35:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559932290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:46,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:46,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:35:46,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920572201] [2021-12-21 15:35:46,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:46,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:35:46,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:35:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:35:46,779 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:46,827 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-12-21 15:35:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:35:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-12-21 15:35:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:46,828 INFO L225 Difference]: With dead ends: 201 [2021-12-21 15:35:46,828 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 15:35:46,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:35:46,829 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:46,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 570 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 15:35:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-12-21 15:35:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-21 15:35:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-12-21 15:35:46,834 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 73 [2021-12-21 15:35:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:46,835 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-12-21 15:35:46,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-12-21 15:35:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 15:35:46,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:46,836 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:46,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:35:46,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:46,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1956548997, now seen corresponding path program 1 times [2021-12-21 15:35:46,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:46,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525909496] [2021-12-21 15:35:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:46,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 15:35:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:35:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:35:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 15:35:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 15:35:47,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525909496] [2021-12-21 15:35:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525909496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:35:47,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017160921] [2021-12-21 15:35:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:47,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:47,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:35:47,008 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) [2021-12-21 15:35:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:35:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 15:35:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:35:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 15:35:47,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:35:47,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017160921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:47,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:35:47,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2021-12-21 15:35:47,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840082054] [2021-12-21 15:35:47,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:47,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:35:47,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:35:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:35:47,440 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-21 15:35:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:47,628 INFO L93 Difference]: Finished difference Result 194 states and 259 transitions. [2021-12-21 15:35:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:35:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-12-21 15:35:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:47,643 INFO L225 Difference]: With dead ends: 194 [2021-12-21 15:35:47,644 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 15:35:47,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:35:47,645 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 130 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:47,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 713 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:35:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 15:35:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-12-21 15:35:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.208955223880597) internal successors, (81), 69 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-12-21 15:35:47,650 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 73 [2021-12-21 15:35:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:47,651 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-12-21 15:35:47,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-21 15:35:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-12-21 15:35:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 15:35:47,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:47,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:47,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:35:47,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:47,873 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1237560575, now seen corresponding path program 1 times [2021-12-21 15:35:47,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987039473] [2021-12-21 15:35:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:47,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 15:35:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 15:35:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:35:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 15:35:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:35:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:35:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:48,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987039473] [2021-12-21 15:35:48,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987039473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:48,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:48,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:35:48,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545216661] [2021-12-21 15:35:48,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:35:48,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:35:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:35:48,031 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:48,105 INFO L93 Difference]: Finished difference Result 197 states and 264 transitions. [2021-12-21 15:35:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:35:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2021-12-21 15:35:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:48,107 INFO L225 Difference]: With dead ends: 197 [2021-12-21 15:35:48,108 INFO L226 Difference]: Without dead ends: 104 [2021-12-21 15:35:48,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:35:48,108 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 49 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:48,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 616 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-21 15:35:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-21 15:35:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2021-12-21 15:35:48,114 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 75 [2021-12-21 15:35:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:48,114 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2021-12-21 15:35:48,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2021-12-21 15:35:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 15:35:48,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:48,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:48,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:35:48,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1187141198, now seen corresponding path program 1 times [2021-12-21 15:35:48,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:48,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447880219] [2021-12-21 15:35:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:48,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 15:35:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 15:35:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:35:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 15:35:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:35:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:35:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:48,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447880219] [2021-12-21 15:35:48,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447880219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:48,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:48,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:35:48,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314666516] [2021-12-21 15:35:48,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:48,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:35:48,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:35:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:35:48,259 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:48,375 INFO L93 Difference]: Finished difference Result 206 states and 277 transitions. [2021-12-21 15:35:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:35:48,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-12-21 15:35:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:48,376 INFO L225 Difference]: With dead ends: 206 [2021-12-21 15:35:48,376 INFO L226 Difference]: Without dead ends: 112 [2021-12-21 15:35:48,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:35:48,377 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 75 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:48,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 716 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:35:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-21 15:35:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2021-12-21 15:35:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-12-21 15:35:48,387 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 77 [2021-12-21 15:35:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:48,387 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-12-21 15:35:48,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-12-21 15:35:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 15:35:48,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:48,388 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-21 15:35:48,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:35:48,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1548809988, now seen corresponding path program 1 times [2021-12-21 15:35:48,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:48,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24631376] [2021-12-21 15:35:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:48,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:35:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:35:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:35:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 15:35:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:35:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:35:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:48,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24631376] [2021-12-21 15:35:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24631376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:48,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:48,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:35:48,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156839090] [2021-12-21 15:35:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:48,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:35:48,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:35:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:35:48,534 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:48,572 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2021-12-21 15:35:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:35:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-12-21 15:35:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:48,574 INFO L225 Difference]: With dead ends: 202 [2021-12-21 15:35:48,574 INFO L226 Difference]: Without dead ends: 111 [2021-12-21 15:35:48,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:35:48,575 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:48,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 449 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:35:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-21 15:35:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-12-21 15:35:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-12-21 15:35:48,582 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 78 [2021-12-21 15:35:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:48,583 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-12-21 15:35:48,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 15:35:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-12-21 15:35:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 15:35:48,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:48,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:48,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:35:48,584 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1185344546, now seen corresponding path program 1 times [2021-12-21 15:35:48,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110691978] [2021-12-21 15:35:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:48,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:35:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 15:35:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 15:35:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 15:35:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:35:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:35:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 15:35:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 15:35:48,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110691978] [2021-12-21 15:35:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110691978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:35:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179846279] [2021-12-21 15:35:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:48,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:35:48,744 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) [2021-12-21 15:35:48,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:35:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 15:35:49,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:35:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 15:35:49,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:35:49,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179846279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:49,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:35:49,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 12 [2021-12-21 15:35:49,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643628902] [2021-12-21 15:35:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:49,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:35:49,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:35:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:35:49,232 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:49,411 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2021-12-21 15:35:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:35:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 86 [2021-12-21 15:35:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:49,414 INFO L225 Difference]: With dead ends: 203 [2021-12-21 15:35:49,414 INFO L226 Difference]: Without dead ends: 111 [2021-12-21 15:35:49,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-21 15:35:49,415 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 132 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:49,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 709 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:35:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-21 15:35:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-12-21 15:35:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2021-12-21 15:35:49,420 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 86 [2021-12-21 15:35:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:49,420 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2021-12-21 15:35:49,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2021-12-21 15:35:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 15:35:49,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:49,421 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:49,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 15:35:49,631 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,SelfDestructingSolverStorable8 [2021-12-21 15:35:49,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash 172862485, now seen corresponding path program 1 times [2021-12-21 15:35:49,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640749977] [2021-12-21 15:35:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:49,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:35:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:35:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:35:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:35:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 15:35:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 15:35:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 15:35:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:49,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640749977] [2021-12-21 15:35:49,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640749977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:35:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060631010] [2021-12-21 15:35:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:49,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:35:49,804 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) [2021-12-21 15:35:49,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:35:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:50,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 15:35:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:35:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 15:35:50,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:35:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060631010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:50,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:35:50,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2021-12-21 15:35:50,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316666580] [2021-12-21 15:35:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:35:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:35:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:35:50,278 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:50,532 INFO L93 Difference]: Finished difference Result 208 states and 274 transitions. [2021-12-21 15:35:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:35:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 88 [2021-12-21 15:35:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:50,533 INFO L225 Difference]: With dead ends: 208 [2021-12-21 15:35:50,533 INFO L226 Difference]: Without dead ends: 115 [2021-12-21 15:35:50,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-12-21 15:35:50,535 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 136 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:50,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 792 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:35:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-21 15:35:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2021-12-21 15:35:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 28 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2021-12-21 15:35:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-12-21 15:35:50,539 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 88 [2021-12-21 15:35:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:50,540 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-12-21 15:35:50,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-12-21 15:35:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 15:35:50,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:50,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:50,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:35:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:50,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 759251201, now seen corresponding path program 1 times [2021-12-21 15:35:50,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333119084] [2021-12-21 15:35:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:50,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:35:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:35:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:35:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:35:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:35:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:35:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:35:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:35:51,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333119084] [2021-12-21 15:35:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333119084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:51,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:51,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-21 15:35:51,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869721948] [2021-12-21 15:35:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:51,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 15:35:51,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 15:35:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:35:51,276 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:51,828 INFO L93 Difference]: Finished difference Result 164 states and 230 transitions. [2021-12-21 15:35:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:35:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-12-21 15:35:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:51,830 INFO L225 Difference]: With dead ends: 164 [2021-12-21 15:35:51,831 INFO L226 Difference]: Without dead ends: 162 [2021-12-21 15:35:51,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-21 15:35:51,831 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 56 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:51,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1384 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 15:35:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-21 15:35:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2021-12-21 15:35:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 92 states have internal predecessors, (102), 43 states have call successors, (43), 9 states have call predecessors, (43), 11 states have return successors, (51), 41 states have call predecessors, (51), 42 states have call successors, (51) [2021-12-21 15:35:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 196 transitions. [2021-12-21 15:35:51,840 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 196 transitions. Word has length 89 [2021-12-21 15:35:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:51,840 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 196 transitions. [2021-12-21 15:35:51,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 196 transitions. [2021-12-21 15:35:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 15:35:51,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:51,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:51,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:35:51,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -50095425, now seen corresponding path program 1 times [2021-12-21 15:35:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:51,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537751811] [2021-12-21 15:35:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:51,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:35:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:35:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:35:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:35:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:35:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:35:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:35:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:35:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:35:52,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:52,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537751811] [2021-12-21 15:35:52,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537751811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:35:52,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:35:52,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:35:52,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685312318] [2021-12-21 15:35:52,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:35:52,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:35:52,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:35:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:35:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:35:52,117 INFO L87 Difference]: Start difference. First operand 143 states and 196 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:35:52,364 INFO L93 Difference]: Finished difference Result 243 states and 336 transitions. [2021-12-21 15:35:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:35:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2021-12-21 15:35:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:35:52,366 INFO L225 Difference]: With dead ends: 243 [2021-12-21 15:35:52,366 INFO L226 Difference]: Without dead ends: 149 [2021-12-21 15:35:52,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:35:52,367 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 54 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:35:52,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 960 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:35:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-21 15:35:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-12-21 15:35:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 97 states have internal predecessors, (107), 43 states have call successors, (43), 9 states have call predecessors, (43), 12 states have return successors, (56), 41 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-21 15:35:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 206 transitions. [2021-12-21 15:35:52,376 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 206 transitions. Word has length 89 [2021-12-21 15:35:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:35:52,376 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 206 transitions. [2021-12-21 15:35:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 15:35:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 206 transitions. [2021-12-21 15:35:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 15:35:52,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:35:52,377 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:35:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:35:52,378 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:35:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:35:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1974343619, now seen corresponding path program 1 times [2021-12-21 15:35:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:35:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553432518] [2021-12-21 15:35:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:52,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:35:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:35:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:35:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 15:35:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:35:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 15:35:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 15:35:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 15:35:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:35:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:35:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:35:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:35:52,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:35:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553432518] [2021-12-21 15:35:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553432518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:35:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374521357] [2021-12-21 15:35:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:35:52,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:35:52,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:35:52,678 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) [2021-12-21 15:35:52,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:35:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:35:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-21 15:35:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:35:53,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-21 15:35:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:35:53,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 15:35:53,146 INFO L353 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-12-21 15:35:53,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 59 [2021-12-21 15:35:53,153 INFO L387 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 47 treesize of output 43 [2021-12-21 15:35:53,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 15:35:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:35:53,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-21 15:35:53,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-21 15:35:55,225 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_1| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_1|) 0) 1) |v_ULTIMATE.start_aws_linked_list_push_back_~list#1.base_BEFORE_CALL_1|)) is different from true [2021-12-21 15:36:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 15:36:17,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:36:17,969 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3570 (Array Int Int)) (v_ArrVal_3572 (Array Int Int)) (v_ArrVal_3571 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3570) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_3572) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_3571)) |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.offset|) |c_ULTIMATE.start_aws_linked_list_push_back_harness_~#list~0#1.base|))) is different from false [2021-12-21 15:36:17,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:36:17,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-21 15:36:18,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:36:18,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 149 [2021-12-21 15:36:18,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2021-12-21 15:36:18,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 138 [2021-12-21 15:36:18,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-21 15:36:18,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-21 15:36:18,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:36:18,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-12-21 15:36:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 1 not checked. [2021-12-21 15:36:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374521357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:36:18,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:36:18,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 30 [2021-12-21 15:36:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657984503] [2021-12-21 15:36:18,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:36:18,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 15:36:18,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:36:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 15:36:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=667, Unknown=7, NotChecked=106, Total=870 [2021-12-21 15:36:18,293 INFO L87 Difference]: Start difference. First operand 148 states and 206 transitions. Second operand has 30 states, 28 states have (on average 4.0) internal successors, (112), 30 states have internal predecessors, (112), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-21 15:36:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:36:57,156 INFO L93 Difference]: Finished difference Result 345 states and 487 transitions. [2021-12-21 15:36:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:36:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.0) internal successors, (112), 30 states have internal predecessors, (112), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2021-12-21 15:36:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:36:57,158 INFO L225 Difference]: With dead ends: 345 [2021-12-21 15:36:57,158 INFO L226 Difference]: Without dead ends: 225 [2021-12-21 15:36:57,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=188, Invalid=1202, Unknown=24, NotChecked=146, Total=1560 [2021-12-21 15:36:57,159 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 227 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 856 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 15:36:57,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2062 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 747 Invalid, 0 Unknown, 856 Unchecked, 0.6s Time] [2021-12-21 15:36:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-21 15:36:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 179. [2021-12-21 15:36:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 124 states have internal predecessors, (137), 45 states have call successors, (45), 11 states have call predecessors, (45), 14 states have return successors, (58), 43 states have call predecessors, (58), 44 states have call successors, (58) [2021-12-21 15:36:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 240 transitions. [2021-12-21 15:36:57,172 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 240 transitions. Word has length 91 [2021-12-21 15:36:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:36:57,173 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 240 transitions. [2021-12-21 15:36:57,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.0) internal successors, (112), 30 states have internal predecessors, (112), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-21 15:36:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 240 transitions. [2021-12-21 15:36:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 15:36:57,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:36:57,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:36:57,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 15:36:57,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:36:57,394 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:36:57,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:36:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -443122435, now seen corresponding path program 1 times [2021-12-21 15:36:57,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:36:57,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628172104] [2021-12-21 15:36:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:36:57,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:36:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:36:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:36:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:36:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:36:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:36:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:36:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:36:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:36:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:36:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:36:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 15:36:57,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:36:57,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628172104] [2021-12-21 15:36:57,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628172104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:36:57,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:36:57,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:36:57,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028291908] [2021-12-21 15:36:57,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:36:57,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:36:57,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:36:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:36:57,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:36:57,590 INFO L87 Difference]: Start difference. First operand 179 states and 240 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 15:36:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:36:57,677 INFO L93 Difference]: Finished difference Result 299 states and 408 transitions. [2021-12-21 15:36:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:36:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2021-12-21 15:36:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:36:57,679 INFO L225 Difference]: With dead ends: 299 [2021-12-21 15:36:57,679 INFO L226 Difference]: Without dead ends: 181 [2021-12-21 15:36:57,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:36:57,680 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 38 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:36:57,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 660 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:36:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-21 15:36:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2021-12-21 15:36:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 124 states have internal predecessors, (137), 44 states have call successors, (44), 11 states have call predecessors, (44), 14 states have return successors, (53), 42 states have call predecessors, (53), 43 states have call successors, (53) [2021-12-21 15:36:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2021-12-21 15:36:57,694 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 89 [2021-12-21 15:36:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:36:57,694 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2021-12-21 15:36:57,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 15:36:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2021-12-21 15:36:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 15:36:57,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:36:57,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:36:57,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 15:36:57,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:36:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:36:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash -270009515, now seen corresponding path program 1 times [2021-12-21 15:36:57,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:36:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065117774] [2021-12-21 15:36:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:36:57,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:36:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:36:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 15:36:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 15:36:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:36:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:36:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:36:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:36:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 15:36:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 15:36:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:36:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:36:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:36:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:36:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-21 15:36:58,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:36:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065117774] [2021-12-21 15:36:58,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065117774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:36:58,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:36:58,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 15:36:58,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817120526] [2021-12-21 15:36:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:36:58,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 15:36:58,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:36:58,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 15:36:58,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:36:58,344 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 7 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12)