./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../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 c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-c7c6ca5-m [2024-11-08 15:22:07,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:22:07,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:22:07,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:22:07,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:22:07,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:22:07,908 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:22:07,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:22:07,909 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:22:07,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:22:07,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:22:07,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:22:07,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:22:07,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:22:07,912 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:22:07,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:22:07,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:22:07,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:22:07,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:22:07,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:22:07,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:22:07,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:22:07,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:22:07,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:22:07,919 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:22:07,920 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:22:07,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:22:07,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:22:07,920 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:22:07,921 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:22:07,921 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:22:07,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:22:07,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:22:07,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:22:07,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:22:07,922 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:22:07,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:22:07,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:22:07,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:22:07,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:22:07,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:22:07,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:22:07,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a00615dde165ef79502be50d436d5b7101f564051a4b91f339855b18841d9599 [2024-11-08 15:22:08,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:22:08,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:22:08,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:22:08,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:22:08,220 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:22:08,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-11-08 15:22:09,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:22:09,847 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:22:09,847 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_2.i [2024-11-08 15:22:09,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb9c1b9c/2041aed2c2d04b10855da2cde4f156b2/FLAG794aed056 [2024-11-08 15:22:10,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb9c1b9c/2041aed2c2d04b10855da2cde4f156b2 [2024-11-08 15:22:10,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:22:10,200 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:22:10,201 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:22:10,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:22:10,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:22:10,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2584b6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10, skipping insertion in model container [2024-11-08 15:22:10,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:22:10,419 WARN L250 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] [2024-11-08 15:22:10,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:22:10,448 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:22:10,461 WARN L250 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] [2024-11-08 15:22:10,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:22:10,485 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:22:10,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10 WrapperNode [2024-11-08 15:22:10,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:22:10,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:22:10,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:22:10,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:22:10,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,517 INFO L138 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2024-11-08 15:22:10,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:22:10,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:22:10,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:22:10,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:22:10,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,528 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,543 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]. [2024-11-08 15:22:10,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:22:10,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:22:10,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:22:10,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:22:10,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (1/1) ... [2024-11-08 15:22:10,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:22:10,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:22:10,589 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) [2024-11-08 15:22:10,592 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 [2024-11-08 15:22:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:22:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:22:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:22:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 15:22:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 15:22:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:22:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:22:10,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 15:22:10,642 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2024-11-08 15:22:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2024-11-08 15:22:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2024-11-08 15:22:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2024-11-08 15:22:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:22:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:22:10,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:22:10,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:22:10,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 15:22:10,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 15:22:10,755 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:22:10,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:22:10,903 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 15:22:10,903 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:22:10,913 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:22:10,913 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 15:22:10,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:22:10 BoogieIcfgContainer [2024-11-08 15:22:10,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:22:10,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:22:10,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:22:10,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:22:10,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:22:10" (1/3) ... [2024-11-08 15:22:10,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514572e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:22:10, skipping insertion in model container [2024-11-08 15:22:10,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:22:10" (2/3) ... [2024-11-08 15:22:10,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514572e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:22:10, skipping insertion in model container [2024-11-08 15:22:10,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:22:10" (3/3) ... [2024-11-08 15:22:10,923 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_2.i [2024-11-08 15:22:10,938 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:22:10,938 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:22:10,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:22:10,989 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;@eefdf05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:22:10,989 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:22:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 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) [2024-11-08 15:22:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 15:22:11,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:22:11,002 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:22:11,003 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] === [2024-11-08 15:22:11,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:22:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 335768241, now seen corresponding path program 1 times [2024-11-08 15:22:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:22:11,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620661587] [2024-11-08 15:22:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:22:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:22:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:11,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:22:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:22:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:22:11,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620661587] [2024-11-08 15:22:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620661587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:22:11,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:22:11,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 15:22:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156673813] [2024-11-08 15:22:11,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:22:11,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 15:22:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:22:11,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 15:22:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 15:22:11,710 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 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 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-08 15:22:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:22:11,880 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2024-11-08 15:22:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 15:22:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2024-11-08 15:22:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:22:11,890 INFO L225 Difference]: With dead ends: 52 [2024-11-08 15:22:11,890 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 15:22:11,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:22:11,897 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:22:11,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:22:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 15:22:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-08 15:22:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 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) [2024-11-08 15:22:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-08 15:22:11,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2024-11-08 15:22:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:22:11,936 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-08 15:22:11,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-08 15:22:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-08 15:22:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 15:22:11,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:22:11,939 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:22:11,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:22:11,940 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] === [2024-11-08 15:22:11,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:22:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1399164292, now seen corresponding path program 1 times [2024-11-08 15:22:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:22:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669691455] [2024-11-08 15:22:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:22:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:22:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:12,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:22:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:12,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:22:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 15:22:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:22:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669691455] [2024-11-08 15:22:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669691455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:22:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15024694] [2024-11-08 15:22:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:22:12,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:22:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:22:12,713 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) [2024-11-08 15:22:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:22:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:12,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 15:22:12,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:22:12,861 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 [2024-11-08 15:22:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 15:22:13,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:22:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:22:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15024694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:22:13,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:22:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2024-11-08 15:22:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570153260] [2024-11-08 15:22:13,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:22:13,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 15:22:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:22:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 15:22:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-08 15:22:13,636 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 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) [2024-11-08 15:22:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:22:14,093 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-11-08 15:22:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 15:22:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 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 20 [2024-11-08 15:22:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:22:14,095 INFO L225 Difference]: With dead ends: 43 [2024-11-08 15:22:14,095 INFO L226 Difference]: Without dead ends: 34 [2024-11-08 15:22:14,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 15:22:14,098 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:22:14,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:22:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-08 15:22:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-08 15:22:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 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) [2024-11-08 15:22:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-08 15:22:14,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 20 [2024-11-08 15:22:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:22:14,109 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-08 15:22:14,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 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) [2024-11-08 15:22:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-08 15:22:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 15:22:14,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:22:14,111 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:22:14,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 15:22:14,315 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 [2024-11-08 15:22:14,316 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] === [2024-11-08 15:22:14,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:22:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1010287503, now seen corresponding path program 2 times [2024-11-08 15:22:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:22:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353416729] [2024-11-08 15:22:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:22:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:22:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:15,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:22:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:15,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:22:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:16,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:22:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:16,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:22:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:16,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 15:22:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:22:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 15:22:16,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:22:16,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353416729] [2024-11-08 15:22:16,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353416729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:22:16,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172878037] [2024-11-08 15:22:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:22:16,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:22:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:22:16,863 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) [2024-11-08 15:22:16,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:22:16,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:22:16,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:22:17,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 15:22:17,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:22:17,014 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 [2024-11-08 15:22:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 15:22:17,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:22:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:22:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172878037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:22:43,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:22:43,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 22] total 51 [2024-11-08 15:22:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965386266] [2024-11-08 15:22:43,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:22:43,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 15:22:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:22:43,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 15:22:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2274, Unknown=6, NotChecked=0, Total=2550 [2024-11-08 15:22:43,846 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 51 states, 40 states have (on average 1.625) internal successors, (65), 44 states have internal predecessors, (65), 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) [2024-11-08 15:23:04,224 WARN L286 SmtUtils]: Spent 20.14s 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) [2024-11-08 15:23:28,733 WARN L286 SmtUtils]: Spent 24.12s 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) [2024-11-08 15:23:49,049 WARN L286 SmtUtils]: Spent 20.11s 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)