./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --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 affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:29:18,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:29:18,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:29:18,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:29:18,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:29:18,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:29:18,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:29:18,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:29:18,442 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:29:18,443 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:29:18,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:29:18,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:29:18,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:29:18,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:29:18,447 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:29:18,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:29:18,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:29:18,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:29:18,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:29:18,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:29:18,448 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:29:18,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:29:18,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:29:18,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:29:18,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:29:18,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:29:18,452 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:29:18,452 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:29:18,452 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:29:18,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:29:18,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:29:18,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:29:18,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:29:18,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:29:18,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:29:18,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:29:18,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:29:18,455 INFO L153 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/certificate-witnesses-artifact/automizer/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/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:29:18,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:29:18,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:29:18,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:29:18,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:29:18,718 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:29:18,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-09-25 11:29:20,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:29:20,227 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:29:20,230 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-09-25 11:29:20,239 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d54c85cef/5d396b77d1c141aba86aa5b5c432a500/FLAG65c073314 [2024-09-25 11:29:20,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d54c85cef/5d396b77d1c141aba86aa5b5c432a500 [2024-09-25 11:29:20,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:29:20,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:29:20,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:29:20,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:29:20,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:29:20,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca64320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20, skipping insertion in model container [2024-09-25 11:29:20,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,300 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:29:20,422 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-09-25 11:29:20,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:29:20,452 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:29:20,461 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-09-25 11:29:20,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:29:20,485 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:29:20,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20 WrapperNode [2024-09-25 11:29:20,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:29:20,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:29:20,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:29:20,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:29:20,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,503 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:29:20,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:29:20,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:29:20,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:29:20,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:29:20,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,533 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 3, 13]. 72 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 1, 4]. [2024-09-25 11:29:20,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:29:20,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:29:20,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:29:20,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:29:20,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (1/1) ... [2024-09-25 11:29:20,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:29:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:29:20,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:29:20,572 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:29:20,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:29:20,607 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_33_0 [2024-09-25 11:29:20,607 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_33_0 [2024-09-25 11:29:20,607 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:29:20,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:29:20,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:29:20,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 11:29:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:29:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:29:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:29:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:29:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 11:29:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 11:29:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 11:29:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:29:20,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:29:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:29:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_40_0 [2024-09-25 11:29:20,611 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_40_0 [2024-09-25 11:29:20,687 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:29:20,689 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:29:20,831 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 11:29:20,832 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:29:20,845 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:29:20,845 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 11:29:20,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:29:20 BoogieIcfgContainer [2024-09-25 11:29:20,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:29:20,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:29:20,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:29:20,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:29:20,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:29:20" (1/3) ... [2024-09-25 11:29:20,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fc0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:29:20, skipping insertion in model container [2024-09-25 11:29:20,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:29:20" (2/3) ... [2024-09-25 11:29:20,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fc0aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:29:20, skipping insertion in model container [2024-09-25 11:29:20,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:29:20" (3/3) ... [2024-09-25 11:29:20,852 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_1-1.i [2024-09-25 11:29:20,864 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:29:20,864 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:29:20,929 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:29:20,936 INFO L336 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@64951cac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:29:20,936 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:29:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 11:29:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 11:29:20,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:29:20,948 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:29:20,948 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:29:20,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -919097502, now seen corresponding path program 1 times [2024-09-25 11:29:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:29:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263507701] [2024-09-25 11:29:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:20,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:29:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:21,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:29:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:21,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:29:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:29:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:29:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263507701] [2024-09-25 11:29:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263507701] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:29:21,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:29:21,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:29:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624567816] [2024-09-25 11:29:21,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:29:21,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:29:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:29:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:29:21,594 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 11:29:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:29:21,791 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-09-25 11:29:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 11:29:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-25 11:29:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:29:21,799 INFO L225 Difference]: With dead ends: 62 [2024-09-25 11:29:21,799 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 11:29:21,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:29:21,805 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:29:21,807 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:29:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 11:29:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-25 11:29:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 11:29:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-25 11:29:21,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2024-09-25 11:29:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:29:21,864 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-25 11:29:21,864 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 11:29:21,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-25 11:29:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:29:21,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:29:21,898 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:29:21,898 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:29:21,899 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:29:21,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 614925112, now seen corresponding path program 1 times [2024-09-25 11:29:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:29:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197791448] [2024-09-25 11:29:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:29:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:22,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:29:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:22,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:29:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:22,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:29:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:29:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197791448] [2024-09-25 11:29:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197791448] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:29:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123088991] [2024-09-25 11:29:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:22,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:29:22,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:29:22,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:29:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:22,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 11:29:22,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:29:22,519 INFO L378 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 [2024-09-25 11:29:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 11:29:22,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:29:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:29:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123088991] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:29:23,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:29:23,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-09-25 11:29:23,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765040588] [2024-09-25 11:29:23,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:29:23,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:29:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:29:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:29:23,012 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:29:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:29:23,383 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-09-25 11:29:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:29:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 24 [2024-09-25 11:29:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:29:23,384 INFO L225 Difference]: With dead ends: 58 [2024-09-25 11:29:23,385 INFO L226 Difference]: Without dead ends: 41 [2024-09-25 11:29:23,385 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-25 11:29:23,386 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:29:23,386 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 36 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:29:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-25 11:29:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-25 11:29:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-25 11:29:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-09-25 11:29:23,401 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2024-09-25 11:29:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:29:23,401 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-09-25 11:29:23,402 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-25 11:29:23,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-09-25 11:29:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-25 11:29:23,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:29:23,403 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:29:23,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:29:23,603 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:23,604 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:29:23,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:29:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash 197148466, now seen corresponding path program 2 times [2024-09-25 11:29:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:29:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907508323] [2024-09-25 11:29:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:29:23,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:29:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:24,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:29:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:24,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:29:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:24,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:24,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:24,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:25,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 11:29:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:29:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 11:29:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:29:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907508323] [2024-09-25 11:29:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907508323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:29:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658710307] [2024-09-25 11:29:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:29:25,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:29:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:29:25,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 11:29:25,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:29:25,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:29:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:29:25,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 11:29:25,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:29:25,198 INFO L378 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 [2024-09-25 11:29:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 11:29:25,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:29:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:29:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658710307] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:29:51,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:29:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 22] total 47 [2024-09-25 11:29:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479652221] [2024-09-25 11:29:51,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:29:51,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 11:29:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:29:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 11:29:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1918, Unknown=6, NotChecked=0, Total=2162 [2024-09-25 11:29:51,244 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 47 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 40 states have internal predecessors, (49), 13 states have call successors, (16), 9 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-25 11:30:39,529 WARN L293 SmtUtils]: Spent 44.16s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 11:30:44,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:30:48,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:30:52,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:30:56,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:00,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:04,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:32,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:36,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:40,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:44,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:48,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:52,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:31:56,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:00,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:04,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:08,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:12,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:16,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:20,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:24,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:28,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:32,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:36,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:40,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:44,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:48,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:52,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:32:56,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:00,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:04,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:32,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:36,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:40,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:44,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:48,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:52,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:33:56,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:34:00,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:34:04,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-25 11:34:08,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []