./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/list-simple/sll2n_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 14:49:15,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 14:49:15,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 14:49:15,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 14:49:15,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 14:49:15,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 14:49:15,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 14:49:15,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 14:49:15,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 14:49:15,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 14:49:15,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 14:49:15,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 14:49:15,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 14:49:15,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 14:49:15,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 14:49:15,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 14:49:15,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 14:49:15,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 14:49:15,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 14:49:15,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 14:49:15,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 14:49:15,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 14:49:15,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 14:49:15,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 14:49:15,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 14:49:15,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 14:49:15,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 14:49:15,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 14:49:15,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 14:49:15,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 14:49:15,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 14:49:15,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 14:49:15,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 14:49:15,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 14:49:15,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 14:49:15,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 14:49:15,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 14:49:15,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 14:49:15,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 14:49:15,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 14:49:15,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 14:49:15,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 14:49:15,519 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 14:49:15,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 14:49:15,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 14:49:15,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 14:49:15,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 14:49:15,521 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 14:49:15,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 14:49:15,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 14:49:15,522 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 14:49:15,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 14:49:15,523 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 14:49:15,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 14:49:15,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 14:49:15,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 14:49:15,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 14:49:15,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 14:49:15,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 14:49:15,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 14:49:15,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 14:49:15,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 14:49:15,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 14:49:15,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 14:49:15,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 14:49:15,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 14:49:15,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 14:49:15,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 14:49:15,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 14:49:15,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 14:49:15,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 14:49:15,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 14:49:15,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 14:49:15,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 14:49:15,527 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 14:49:15,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 14:49:15,527 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 14:49:15,528 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2023-02-18 14:49:15,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 14:49:15,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 14:49:15,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 14:49:15,797 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 14:49:15,797 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 14:49:15,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-18 14:49:16,948 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 14:49:17,197 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 14:49:17,198 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-18 14:49:17,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4c299da2/5c7968d33274467bb418019d63f3d4cb/FLAG7e2b9ddbb [2023-02-18 14:49:17,233 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4c299da2/5c7968d33274467bb418019d63f3d4cb [2023-02-18 14:49:17,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 14:49:17,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 14:49:17,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 14:49:17,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 14:49:17,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 14:49:17,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d403d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17, skipping insertion in model container [2023-02-18 14:49:17,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 14:49:17,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 14:49:17,604 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-18 14:49:17,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 14:49:17,623 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 14:49:17,680 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-18 14:49:17,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 14:49:17,710 INFO L208 MainTranslator]: Completed translation [2023-02-18 14:49:17,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17 WrapperNode [2023-02-18 14:49:17,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 14:49:17,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 14:49:17,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 14:49:17,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 14:49:17,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,761 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-02-18 14:49:17,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 14:49:17,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 14:49:17,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 14:49:17,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 14:49:17,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 14:49:17,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 14:49:17,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 14:49:17,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 14:49:17,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (1/1) ... [2023-02-18 14:49:17,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 14:49:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:49:17,830 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) [2023-02-18 14:49:17,842 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 [2023-02-18 14:49:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 14:49:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 14:49:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-18 14:49:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 14:49:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 14:49:17,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 14:49:17,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 14:49:17,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 14:49:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 14:49:17,973 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 14:49:17,974 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 14:49:18,176 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 14:49:18,180 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 14:49:18,181 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 14:49:18,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:49:18 BoogieIcfgContainer [2023-02-18 14:49:18,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 14:49:18,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 14:49:18,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 14:49:18,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 14:49:18,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:49:17" (1/3) ... [2023-02-18 14:49:18,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ae35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:49:18, skipping insertion in model container [2023-02-18 14:49:18,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:49:17" (2/3) ... [2023-02-18 14:49:18,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ae35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:49:18, skipping insertion in model container [2023-02-18 14:49:18,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:49:18" (3/3) ... [2023-02-18 14:49:18,190 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2023-02-18 14:49:18,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 14:49:18,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 14:49:18,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 14:49:18,245 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2473124c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 14:49:18,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 14:49:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 14:49:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 14:49:18,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:18,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:18,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash -246443823, now seen corresponding path program 1 times [2023-02-18 14:49:18,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:18,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388734202] [2023-02-18 14:49:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:18,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 14:49:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:49:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388734202] [2023-02-18 14:49:18,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388734202] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:49:18,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:49:18,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 14:49:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938096458] [2023-02-18 14:49:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:49:18,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 14:49:18,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:49:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 14:49:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 14:49:18,498 INFO L87 Difference]: Start difference. First operand has 34 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 14:49:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:49:18,555 INFO L93 Difference]: Finished difference Result 62 states and 91 transitions. [2023-02-18 14:49:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 14:49:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-18 14:49:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:49:18,564 INFO L225 Difference]: With dead ends: 62 [2023-02-18 14:49:18,564 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 14:49:18,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 14:49:18,572 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 14:49:18,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 14:49:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 14:49:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 14:49:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 14:49:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-02-18 14:49:18,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 19 [2023-02-18 14:49:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:49:18,610 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-02-18 14:49:18,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 14:49:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-02-18 14:49:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 14:49:18,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:18,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:18,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 14:49:18,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1738034235, now seen corresponding path program 1 times [2023-02-18 14:49:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514489705] [2023-02-18 14:49:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 14:49:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:49:18,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514489705] [2023-02-18 14:49:18,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514489705] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:49:18,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:49:18,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 14:49:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522886517] [2023-02-18 14:49:18,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:49:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 14:49:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:49:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 14:49:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:49:18,829 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 14:49:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:49:18,871 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-02-18 14:49:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 14:49:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-18 14:49:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:49:18,873 INFO L225 Difference]: With dead ends: 54 [2023-02-18 14:49:18,873 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 14:49:18,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:49:18,875 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 14:49:18,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 14:49:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 14:49:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-02-18 14:49:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 14:49:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-02-18 14:49:18,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 19 [2023-02-18 14:49:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:49:18,883 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-02-18 14:49:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 14:49:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-02-18 14:49:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 14:49:18,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:18,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 14:49:18,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1368908325, now seen corresponding path program 1 times [2023-02-18 14:49:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:18,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811871794] [2023-02-18 14:49:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:49:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 14:49:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:49:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811871794] [2023-02-18 14:49:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811871794] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:49:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288747783] [2023-02-18 14:49:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:19,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:49:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:49:19,065 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) [2023-02-18 14:49:19,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 14:49:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 14:49:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:49:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:49:19,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 14:49:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:49:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288747783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 14:49:19,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 14:49:19,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-18 14:49:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275753263] [2023-02-18 14:49:19,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 14:49:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 14:49:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:49:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 14:49:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 14:49:19,355 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 14:49:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:49:19,429 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-02-18 14:49:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 14:49:19,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-18 14:49:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:49:19,432 INFO L225 Difference]: With dead ends: 55 [2023-02-18 14:49:19,434 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 14:49:19,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 14:49:19,436 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 14:49:19,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 14:49:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 14:49:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-18 14:49:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 14:49:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 14:49:19,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 28 [2023-02-18 14:49:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:49:19,447 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 14:49:19,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 14:49:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 14:49:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 14:49:19,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:19,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:19,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 14:49:19,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:49:19,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1136271419, now seen corresponding path program 2 times [2023-02-18 14:49:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729887084] [2023-02-18 14:49:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:49:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 14:49:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 14:49:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 14:49:19,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729887084] [2023-02-18 14:49:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729887084] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:49:19,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:49:19,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 14:49:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361247479] [2023-02-18 14:49:19,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:49:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 14:49:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:49:19,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 14:49:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:49:19,820 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 14:49:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:49:19,874 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-02-18 14:49:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 14:49:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-18 14:49:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:49:19,875 INFO L225 Difference]: With dead ends: 57 [2023-02-18 14:49:19,876 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 14:49:19,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:49:19,877 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 14:49:19,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 14:49:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 14:49:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2023-02-18 14:49:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 14:49:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-02-18 14:49:19,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 37 [2023-02-18 14:49:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:49:19,884 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-02-18 14:49:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 14:49:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-02-18 14:49:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 14:49:19,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:19,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 14:49:19,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1079013117, now seen corresponding path program 1 times [2023-02-18 14:49:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:19,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581142350] [2023-02-18 14:49:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:19,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:49:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 14:49:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:20,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 14:49:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 14:49:20,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581142350] [2023-02-18 14:49:20,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581142350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:49:20,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:49:20,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 14:49:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755126787] [2023-02-18 14:49:20,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:49:20,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 14:49:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:49:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 14:49:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 14:49:20,079 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 14:49:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:49:20,147 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-02-18 14:49:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 14:49:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-18 14:49:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:49:20,155 INFO L225 Difference]: With dead ends: 46 [2023-02-18 14:49:20,155 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 14:49:20,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 14:49:20,156 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 14:49:20,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 14:49:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 14:49:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-18 14:49:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 14:49:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-02-18 14:49:20,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 37 [2023-02-18 14:49:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:49:20,166 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-02-18 14:49:20,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 14:49:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-02-18 14:49:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 14:49:20,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:49:20,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:49:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 14:49:20,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:49:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:49:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -300753136, now seen corresponding path program 1 times [2023-02-18 14:49:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:49:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549765874] [2023-02-18 14:49:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:49:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:49:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:21,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 14:49:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 14:49:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:49:21,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:49:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549765874] [2023-02-18 14:49:21,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549765874] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:49:21,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771855431] [2023-02-18 14:49:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:49:21,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:49:21,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:49:21,765 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) [2023-02-18 14:49:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 14:49:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:49:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-18 14:49:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:49:22,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 14:49:22,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 14:49:22,173 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2023-02-18 14:49:22,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-02-18 14:49:22,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-02-18 14:49:22,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-18 14:49:22,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-18 14:49:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,450 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 40 [2023-02-18 14:49:22,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 50 [2023-02-18 14:49:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,465 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 32 [2023-02-18 14:49:22,475 INFO L350 Elim1Store]: Elim1 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 3 [2023-02-18 14:49:22,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-02-18 14:49:22,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 122 [2023-02-18 14:49:22,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2023-02-18 14:49:22,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2023-02-18 14:49:22,669 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 46 [2023-02-18 14:49:22,676 INFO L350 Elim1Store]: Elim1 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 127 treesize of output 105 [2023-02-18 14:49:22,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 266 treesize of output 289 [2023-02-18 14:49:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 273 [2023-02-18 14:49:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:49:22,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:22,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-02-18 14:49:22,830 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,856 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 40 [2023-02-18 14:49:22,863 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,871 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 40 [2023-02-18 14:49:22,874 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,880 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,909 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,913 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,914 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,917 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,918 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,924 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,927 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,929 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,935 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:22,941 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:23,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1674 treesize of output 1405 [2023-02-18 14:49:23,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1420 treesize of output 1270 [2023-02-18 14:49:23,499 INFO L350 Elim1Store]: Elim1 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 3 [2023-02-18 14:49:23,509 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:23,519 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:23,528 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:49:23,725 INFO L350 Elim1Store]: Elim1 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 3644 treesize of output 3129 [2023-02-18 14:49:23,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:23,810 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 3153 treesize of output 2860 [2023-02-18 14:49:25,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:49:25,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 149 select indices, 149 select index equivalence classes, 0 disjoint index pairs (out of 11026 index pairs), introduced 149 new quantified variables, introduced 11026 case distinctions, treesize of input 6361 treesize of output 93777