./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 a046e57d 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-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:48:04,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:48:04,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:48:04,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:48:04,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:48:04,705 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:48:04,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:48:04,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:48:04,706 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:48:04,706 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:48:04,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:48:04,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:48:04,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:48:04,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:48:04,709 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:48:04,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:48:04,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:48:04,710 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:48:04,710 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:48:04,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:48:04,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:48:04,711 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:48:04,712 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:48:04,712 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:48:04,712 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:48:04,713 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:48:04,713 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:48:04,713 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:48:04,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:48:04,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:48:04,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:48:04,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:48:04,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:48:04,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:48:04,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:48:04,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:48:04,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:48:04,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:48:04,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:48:04,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:48:04,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:48:04,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:48:04,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 [2024-10-12 19:48:04,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:48:04,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:48:04,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:48:04,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:48:04,977 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:48:04,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-10-12 19:48:06,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:48:06,557 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:48:06,557 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-10-12 19:48:06,564 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ed410cc/368fe2f78c844b08ae3fcbedf85c8db2/FLAG75adf8f19 [2024-10-12 19:48:06,955 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ed410cc/368fe2f78c844b08ae3fcbedf85c8db2 [2024-10-12 19:48:06,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:48:06,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:48:06,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:48:06,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:48:06,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:48:06,965 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:48:06" (1/1) ... [2024-10-12 19:48:06,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e1e1ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:06, skipping insertion in model container [2024-10-12 19:48:06,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:48:06" (1/1) ... [2024-10-12 19:48:06,994 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:48:07,182 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] [2024-10-12 19:48:07,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:48:07,219 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:48:07,232 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] [2024-10-12 19:48:07,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:48:07,269 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:48:07,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07 WrapperNode [2024-10-12 19:48:07,270 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:48:07,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:48:07,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:48:07,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:48:07,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,310 INFO L138 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2024-10-12 19:48:07,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:48:07,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:48:07,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:48:07,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:48:07,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,351 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]. [2024-10-12 19:48:07,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:48:07,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:48:07,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:48:07,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:48:07,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (1/1) ... [2024-10-12 19:48:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:48:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:07,405 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) [2024-10-12 19:48:07,412 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 [2024-10-12 19:48:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:48:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:48:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:48:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 19:48:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 19:48:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 19:48:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 19:48:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 19:48:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2024-10-12 19:48:07,463 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2024-10-12 19:48:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2024-10-12 19:48:07,464 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2024-10-12 19:48:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:48:07,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:48:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 19:48:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 19:48:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 19:48:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 19:48:07,555 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:48:07,560 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:48:07,729 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 19:48:07,730 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:48:07,761 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:48:07,761 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-12 19:48:07,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:48:07 BoogieIcfgContainer [2024-10-12 19:48:07,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:48:07,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:48:07,768 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:48:07,771 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:48:07,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:48:06" (1/3) ... [2024-10-12 19:48:07,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a140e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:48:07, skipping insertion in model container [2024-10-12 19:48:07,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:48:07" (2/3) ... [2024-10-12 19:48:07,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a140e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:48:07, skipping insertion in model container [2024-10-12 19:48:07,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:48:07" (3/3) ... [2024-10-12 19:48:07,775 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_2.i [2024-10-12 19:48:07,795 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:48:07,795 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:48:07,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:48:07,867 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;@70d86841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:48:07,868 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:48:07,872 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) [2024-10-12 19:48:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 19:48:07,880 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:07,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:48:07,881 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] === [2024-10-12 19:48:07,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash 290853727, now seen corresponding path program 1 times [2024-10-12 19:48:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:07,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190936032] [2024-10-12 19:48:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:08,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:48:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:08,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:08,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190936032] [2024-10-12 19:48:08,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190936032] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:48:08,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:48:08,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:48:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460881222] [2024-10-12 19:48:08,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:48:08,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 19:48:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 19:48:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:48:08,642 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) [2024-10-12 19:48:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:08,879 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2024-10-12 19:48:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 19:48:08,882 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 [2024-10-12 19:48:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:08,890 INFO L225 Difference]: With dead ends: 47 [2024-10-12 19:48:08,890 INFO L226 Difference]: Without dead ends: 20 [2024-10-12 19:48:08,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:48:08,897 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 [2024-10-12 19:48:08,898 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] [2024-10-12 19:48:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-12 19:48:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-12 19:48:08,936 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) [2024-10-12 19:48:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-12 19:48:08,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-10-12 19:48:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:08,941 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-12 19:48:08,941 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) [2024-10-12 19:48:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-12 19:48:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 19:48:08,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:08,944 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:48:08,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:48:08,945 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] === [2024-10-12 19:48:08,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -813217266, now seen corresponding path program 1 times [2024-10-12 19:48:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396571941] [2024-10-12 19:48:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:09,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:48:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:09,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:48:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 19:48:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396571941] [2024-10-12 19:48:09,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396571941] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:09,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123753496] [2024-10-12 19:48:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:09,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:09,693 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) [2024-10-12 19:48:09,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:48:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:09,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 19:48:09,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:09,828 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 [2024-10-12 19:48:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 19:48:10,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:48:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123753496] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:48:10,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:48:10,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 23 [2024-10-12 19:48:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821467404] [2024-10-12 19:48:10,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:48:10,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 19:48:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 19:48:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:48:10,608 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) [2024-10-12 19:48:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:48:11,085 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-12 19:48:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 19:48:11,086 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 [2024-10-12 19:48:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:48:11,087 INFO L225 Difference]: With dead ends: 42 [2024-10-12 19:48:11,087 INFO L226 Difference]: Without dead ends: 33 [2024-10-12 19:48:11,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 19:48:11,089 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:48:11,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:48:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-12 19:48:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-10-12 19:48:11,100 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) [2024-10-12 19:48:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-10-12 19:48:11,103 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 19 [2024-10-12 19:48:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:48:11,103 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-10-12 19:48:11,104 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) [2024-10-12 19:48:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-10-12 19:48:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 19:48:11,106 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:48:11,107 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:48:11,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 19:48:11,311 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 [2024-10-12 19:48:11,312 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] === [2024-10-12 19:48:11,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:48:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash -195283937, now seen corresponding path program 2 times [2024-10-12 19:48:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:48:11,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063621670] [2024-10-12 19:48:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:48:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:48:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:12,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-12 19:48:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:13,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:48:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:13,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:48:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:13,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:48:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:14,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:48:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:48:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 19:48:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:48:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063621670] [2024-10-12 19:48:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063621670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:48:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640190043] [2024-10-12 19:48:14,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:48:14,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:48:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:48:14,194 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) [2024-10-12 19:48:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:48:14,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:48:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:48:14,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-12 19:48:14,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:48:14,331 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 [2024-10-12 19:48:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-12 19:48:14,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:48:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:48:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640190043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:48:41,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:48:41,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 21] total 50 [2024-10-12 19:48:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448786528] [2024-10-12 19:48:41,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:48:41,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-12 19:48:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:48:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-12 19:48:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2274, Unknown=6, NotChecked=0, Total=2550 [2024-10-12 19:48:41,101 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) [2024-10-12 19:49:05,409 WARN L286 SmtUtils]: Spent 24.09s 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) [2024-10-12 19:49:29,803 WARN L286 SmtUtils]: Spent 24.13s 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)