./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.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 --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 a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 01:08:14,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 01:08:14,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 01:08:14,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 01:08:14,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 01:08:14,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 01:08:14,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 01:08:14,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 01:08:14,414 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 01:08:14,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 01:08:14,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 01:08:14,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 01:08:14,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 01:08:14,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 01:08:14,415 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 01:08:14,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 01:08:14,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 01:08:14,416 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 01:08:14,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 01:08:14,417 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 01:08:14,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 01:08:14,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 01:08:14,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 01:08:14,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 01:08:14,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 01:08:14,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 01:08:14,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 01:08:14,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 01:08:14,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 01:08:14,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 01:08:14,423 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 01:08:14,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 01:08:14,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:08:14,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 01:08:14,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 01:08:14,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 01:08:14,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 01:08:14,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 01:08:14,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 01:08:14,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 01:08:14,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 01:08:14,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 01:08:14,425 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 [2024-10-24 01:08:14,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 01:08:14,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 01:08:14,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 01:08:14,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 01:08:14,689 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 01:08:14,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-10-24 01:08:16,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 01:08:16,281 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 01:08:16,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-10-24 01:08:16,287 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515bf48a0/09e7ac844eac4b1ea1905995e92bd5a4/FLAG5b1858dff [2024-10-24 01:08:16,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515bf48a0/09e7ac844eac4b1ea1905995e92bd5a4 [2024-10-24 01:08:16,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 01:08:16,302 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 01:08:16,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 01:08:16,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 01:08:16,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 01:08:16,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6d5572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16, skipping insertion in model container [2024-10-24 01:08:16,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,325 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 01:08:16,447 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i[1800,1813] [2024-10-24 01:08:16,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:08:16,474 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 01:08:16,486 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i[1800,1813] [2024-10-24 01:08:16,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:08:16,507 INFO L204 MainTranslator]: Completed translation [2024-10-24 01:08:16,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16 WrapperNode [2024-10-24 01:08:16,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 01:08:16,508 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 01:08:16,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 01:08:16,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 01:08:16,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,536 INFO L138 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2024-10-24 01:08:16,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 01:08:16,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 01:08:16,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 01:08:16,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 01:08:16,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,564 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 12, 2]. 75 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, 4, 1]. [2024-10-24 01:08:16,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 01:08:16,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 01:08:16,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 01:08:16,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 01:08:16,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (1/1) ... [2024-10-24 01:08:16,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:08:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:08:16,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 01:08:16,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 01:08:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 01:08:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 01:08:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 01:08:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2024-10-24 01:08:16,658 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2024-10-24 01:08:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 01:08:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 01:08:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 01:08:16,720 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 01:08:16,721 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 01:08:16,872 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-24 01:08:16,873 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 01:08:16,906 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 01:08:16,906 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-24 01:08:16,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:16 BoogieIcfgContainer [2024-10-24 01:08:16,907 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 01:08:16,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 01:08:16,909 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 01:08:16,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 01:08:16,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:08:16" (1/3) ... [2024-10-24 01:08:16,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c74062a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:16, skipping insertion in model container [2024-10-24 01:08:16,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:16" (2/3) ... [2024-10-24 01:08:16,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c74062a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:16, skipping insertion in model container [2024-10-24 01:08:16,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:16" (3/3) ... [2024-10-24 01:08:16,914 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_2.i [2024-10-24 01:08:16,951 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 01:08:16,952 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 01:08:17,005 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 01:08:17,010 INFO L333 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=LoopHeads, 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;@38ac7289, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 01:08:17,010 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 01:08:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 01:08:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 01:08:17,018 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:08:17,019 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:08:17,019 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:08:17,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:08:17,023 INFO L85 PathProgramCache]: Analyzing trace with hash 290853727, now seen corresponding path program 1 times [2024-10-24 01:08:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:08:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358511422] [2024-10-24 01:08:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:08:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:08:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:17,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:08:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 01:08:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:08:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358511422] [2024-10-24 01:08:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358511422] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:08:17,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:08:17,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 01:08:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616865163] [2024-10-24 01:08:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:08:17,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 01:08:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:08:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 01:08:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 01:08:17,474 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 01:08:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:08:17,588 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2024-10-24 01:08:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 01:08:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-24 01:08:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:08:17,596 INFO L225 Difference]: With dead ends: 47 [2024-10-24 01:08:17,596 INFO L226 Difference]: Without dead ends: 20 [2024-10-24 01:08:17,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 01:08:17,601 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 01:08:17,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 01:08:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-24 01:08:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-24 01:08:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 01:08:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-24 01:08:17,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-10-24 01:08:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:08:17,628 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-24 01:08:17,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 01:08:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-24 01:08:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 01:08:17,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:08:17,634 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:08:17,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 01:08:17,634 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:08:17,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:08:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -813217266, now seen corresponding path program 1 times [2024-10-24 01:08:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:08:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976370047] [2024-10-24 01:08:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:08:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:08:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:18,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:08:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:18,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-24 01:08:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 01:08:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:08:18,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976370047] [2024-10-24 01:08:18,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976370047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:08:18,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929645657] [2024-10-24 01:08:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:08:18,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:08:18,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:08:18,726 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) [2024-10-24 01:08:18,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 01:08:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:18,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 01:08:18,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:08:18,841 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 [2024-10-24 01:08:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 01:08:18,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:08:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 01:08:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929645657] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:08:19,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 01:08:19,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 23 [2024-10-24 01:08:19,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642069629] [2024-10-24 01:08:19,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 01:08:19,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 01:08:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:08:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 01:08:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-10-24 01:08:19,333 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 01:08:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:08:19,656 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-24 01:08:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 01:08:19,656 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 19 [2024-10-24 01:08:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:08:19,657 INFO L225 Difference]: With dead ends: 42 [2024-10-24 01:08:19,657 INFO L226 Difference]: Without dead ends: 33 [2024-10-24 01:08:19,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 01:08:19,659 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 01:08:19,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 01:08:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-24 01:08:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-10-24 01:08:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 01:08:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-10-24 01:08:19,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 19 [2024-10-24 01:08:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:08:19,665 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-10-24 01:08:19,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-24 01:08:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-10-24 01:08:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 01:08:19,667 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:08:19,667 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:08:19,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 01:08:19,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:08:19,868 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:08:19,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:08:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash -195283937, now seen corresponding path program 2 times [2024-10-24 01:08:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:08:19,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284932486] [2024-10-24 01:08:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:08:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:08:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:20,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 01:08:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:20,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-24 01:08:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:21,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-24 01:08:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:21,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-24 01:08:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:21,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-24 01:08:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:08:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 01:08:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:08:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284932486] [2024-10-24 01:08:21,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284932486] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:08:21,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911667560] [2024-10-24 01:08:21,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 01:08:21,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:08:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:08:21,880 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) [2024-10-24 01:08:21,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 01:08:21,996 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 01:08:21,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 01:08:22,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-24 01:08:22,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:08:22,009 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 [2024-10-24 01:08:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-24 01:08:22,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:08:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 01:08:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911667560] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 01:08:48,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 01:08:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 21] total 50 [2024-10-24 01:08:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367892949] [2024-10-24 01:08:48,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 01:08:48,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 01:08:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:08:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 01:08:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2274, Unknown=6, NotChecked=0, Total=2550 [2024-10-24 01:08:48,429 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 51 states, 40 states have (on average 1.6) internal successors, (64), 43 states have internal predecessors, (64), 12 states have call successors, (13), 8 states have call predecessors, (13), 15 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-10-24 01:09:12,785 WARN L286 SmtUtils]: Spent 24.12s on a formula simplification. DAG size of input: 76 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 01:09:37,211 WARN L286 SmtUtils]: Spent 24.16s on a formula simplification. DAG size of input: 69 DAG size of output: 57 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 01:10:01,571 WARN L286 SmtUtils]: Spent 24.17s on a formula simplification. DAG size of input: 62 DAG size of output: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)